What would be the expected ph if you were to add 150 ml of 0.1 n naoh to 200 ml of 0.1 m formic acid and then bring the solution up to 1 l?
Answers
The pH of solution will reach upto 4.22 after bringing the solution to 1L.
The reaction is HCOOH + NaOH ----> HCOONa + H2O
What is pH?
Since the pH of a substance is essentially a measurement of the concentration of hydrogen ions (or protons), the letters pH stand for potential of hydrogen. Biologist Sren Peter Lauritz Srensen created the pH scale in 1923. (1868-1969).
Potential of Hydrogen is what pH is formally known as.The definition of pH as the quantity of hydrogen is given as the negative logarithm of the concentration of H+ ions. The hydrogen ion concentration in a solution is described by the pH scale, which also determines how acidic or basic a solution is.
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Related Questions
Q.10 Fats and oils Unsaturated fats and oils contain at least one carbon to carbon double bond. These double bonds react with bromine water which changes colour from orange to colourless Plan an experiment that could be carried out to compare samples of sunflower oil, olive oil and butter to find out which of these contains the largest number of carbon to carbon double bonds You are provided with common laboratory apparatus and an organic solvent to dissolve the fats and oils
Answers
Based on the results obtained, the sample with the shortest time taken for the color change to occur contains the largest number of carbon to carbon double bonds.
What is Saturated Fat?
Saturated fat is a type of fat in which all the carbon atoms in the fatty acid chains are bonded to hydrogen atoms, leaving no double bonds between the carbon atoms. This results in a straight and rigid molecular structure that allows the fat molecules to pack tightly together, leading to a solid or semi-solid consistency at room temperature. Saturated fats are commonly found in animal products, such as meat and dairy, as well as in some plant-based sources like coconut and palm oil. A diet high in saturated fats has been linked to an increased risk of heart disease and other health problems.
The sample with the largest number of carbon to carbon double bonds will react the fastest with the bromine water, resulting in the quickest color change from orange to colorless. Therefore, the sample with the shortest time taken for the color change to occur will contain the largest number of carbon to carbon double bonds.
Therefore, the sample that contains the most carbon to carbon double bonds can be determined by comparing the times taken for the color change to occur in each sample.
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Consider the balanced equation below.
Which option gives the correct mole ratios?
OH₂S:SO2 = 2:2 and O₂:H₂O = 3:2
OH₂S:SO₂ = 2:3 and O₂: H₂O = 3:2
H.S.SO. - 4:4 and 0 H.0-5.4
8
9
10
2H₂S +3022SO₂ + 2H₂O
Answers
The correct option is (a) H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2
What is molar Ratio ?
Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation
the balanced equation is as follows ;
2H₂S + 3O₂ --> 2SO₂ + 2H₂O
molar ratio can be determined by the coefficients of the compounds in the balanced reaction.
coefficient is the number in front of the chemical compound
coefficients for the compounds in this reaction are as follows ;
H₂S - 2O₂ - 3SO₂ - 2H₂O - 2therefore, correct option is (a) H₂S:SO₂ = 2:2 and O₂:H₂O = 3:2
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How many grams of oxygen gas would be needed to react completely with 9.76 moles of iron according to the equation below? Please round your answer to two digits after the decimal point please include the substances and units.
Fe + O2 --> Fe2O3
thank you in advance!!
Answers
739.20 g of oxygen gas would be needed to react completely with 9.76 moles of iron according to the equation Fe + O2 --> Fe2O3. This can be determined by using the mole ratio from the balanced equation.
What is iron?Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust.
The ratio of iron to oxygen is 1:2, so for every 1 mole of iron, 2 moles of oxygen is needed. Since 9.76 moles of iron is given, 9.76 x 2 = 19.52 moles of oxygen is needed. To convert moles of oxygen to grams, 19.52 moles of oxygen gas is multiplied by the molar mass of oxygen, which is 16.00 g/mol. 19.52 moles x 16.00 g/mol = 312.32 g. Since the equation calls for 2 moles of oxygen, 312.32 g is multiplied by 2, giving a total of 739.20 g of oxygen gas.
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Which statement about Niels Bohr's atomic model is true?
Answers
Correct answer is Each orbit has a specific energy level.
According to Bohr's atomic model There is a certain energy for each orbit, with the inner orbit having the lowest energy. As you move farther from the nucleus, the energy of the orbits increases. We can say that the energy of the electrons are quantized if we state that they can only have certain energies.The ground state, also known as the lowest orbit, is where the electron typically resides.A lower energy level to a higher energy level is reached by an atom's electrons by gaining the necessary energy, and a higher energy level to a lower energy level by losing energy.Inner energy levels have low energy and outer or higher energy levels have high energy.Therefore, Correct statement is Each orbit has a specific energy level.
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The complete question is mentioned below:
Which statement about Niels Bohr’s atomic model is true?
a) Higher orbits have lower energies.
b) Each orbit has a specific energy level. c) Electrons can exist in any energy level. d) Orbits close to the nucleus have no energy.
Draw the structure(s) of the major organic product(s) of the following reaction. 1. LiAlH4 / dry Et O -H 2. aqueous HCI • You do not have to consider stereochemistry. • If no reaction occurs, draw the organic starting material. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu
Answers
Structure and the reaction is in the attached photo.
Amides, RCONR'2, can be reduced to the amine, RCH2NR'2 by conversion of the C=O to -CH2-. Amides can be reduced by LiAlH4 but not the with the less reactive NaBH4. Some of the reagents are LiAlH4 / ether solvent, followed by water.
This reduction reaction is different from the different to that of other C=O compounds which reduce to alcohols like in esters.
Lithium aluminium hydride (LiAlH4) and sodium borohydride are the two most frequent sources of the hydride nucleophile (NaBH4).
The presence of a polar metal-hydrogen bond in these reagents acts as a source of hydride rather than the hydride anion, which is absent during this reaction. Since the Al-H bond in LiAlH4 is more polar and aluminium is less electronegative than boron, LiAlH4 is a more potent reducer.
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11. A 30-kg box is 0.2 m long and 0.15 m wide. What pressure does it exert on the floor?
Answers
Answer:
P = 9800 Pa
Explanation:
Given that,
The mass of a box, m = 30 kg
Length of the box, l = 0.2 m
The width of a box, b = 0.15 m
We need to find the pressure it exerted on the floor. Pressure is equal to force acting per unit area. So,
\(P=\dfrac{F}{A}\\\\=\dfrac{mg}{lb}\\\\=\dfrac{30\times 9.8}{0.2\times 0.15}\\\\P=9800\ Pa\)
So, 9800 Pa of pressure is exerted on the floor.
Rank the following 3rd period atoms in order of increasing force of attraction on its respective electrons.
Sodium, silicon, magnesium, sulfur, argon
A. argon, sulfur, silicon, magnesium, sodium
B. sodium, magnesium, silicon, sulfur, argon
C. sulfur, silicon, argon, sodium, magnesium
D. argon, silicon, magnesium, sulfur, sodium
Answers
Answer:
B
that's all HAHA why do it have to be 20 characters to answerrr
If 0.1 M NaOH solution was used in this titration, which statement correctly explains point B on the curve?
O This is the equivalence point of the curve.
O 0.003 mol of OH ions are present in the flask at this point.
O 0.0005 is the number of excess moles of OH ions at this point.
O 0.0005 is the number of moles of H* ions present at this point.
Answers
Answer:
The correct statement is: O This is the equivalence point of the curve.
Explanation:
The equivalence point is the point in a titration where the number of moles of acid added is equal to the number of moles of base needed to neutralize the acid. At this point, the acid and base react to form water and a salt. The pH at the equivalence point depends on the strength of the acid and base being used and the total volume of the solution. In general, the pH at the equivalence point will be higher for a strong acid-strong base titration than for a weak acid-strong base titration.
Pleaseeee answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!! Explain well !!!!!!!!!!!!!
Answers
No all atoms on earth are not the same, all things are made of atoms, and all atoms are made of the same three basic particles - protons, neutrons, and electrons. But, all atoms are not the same. ... The difference in the number of protons and neutrons in atoms account for many of the different properties of elements
Nitrogen is a group 15 element. What does being In this group imply about the structure of the nitrogen atom?
Answers
Answer:
Nitrogen has 5 valence electrons
Explanation:
nitrogen has it's attoms form triple bonds which are very hard to break
so non-reactive
Copper(II) sulfate crystals, CuSO4.5H₂O, can be made by heating copper(II) oxide with dilute
sulfuric acid and then crystallising the solution formed.
a
Calculate the maximum mass of crystals that could be made from 4.00 g of
copper(II)oxide using an excess of sulfuric acid.
CuO(s) + H₂SO4(aq) → CuSO4(aq) + H₂O(1)
CuSO4(aq) + 5H₂O(l) → CuSO4.5H₂O(s)
Answers
8.05 g of CuSO₄ is the highest mass of crystals.
a) CuO(solid) + H₂SO₄(aqueous) → CuSO₄(aqueous) + H₂O(liquid)
Molecular weight,
CuO = 79 g
Molar weight of CuSO₄ = 159 g,
79 g of CuO reacted with H₂SO₄ 159 g to form CuSO₄.
∴ 4 g of CuO
= 159/79 × 4
= 8.05 g of CuSO₄
b) Percentage yield and Theoretical yield :
The Theoretical yield:
CuSO₄ of 159.6 g → CuSO₄.5H₂O of 249.5 g
8.05 g = 249.5 × 8.05 ÷ 159.6 = 12.58 g
And the percentage yield = Weight of the product ÷ Theoretical yield × 100
= 11.25 ÷ 12.58 × 100
= 89.42%
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Which of the following would be expected to be the most soluble in water?
Answers
The most soluble compound in water among the options provided would be propanal (also known as propionaldehyde). Option B is correct.
Propanal is a polar compound that contains a carbonyl group (C=O), which allows it to form hydrogen bonds with water molecules. Hydrogen bonding between propanal and water enhances its solubility.
On the other hand, cyclobutane is a nonpolar compound composed solely of carbon and hydrogen atoms. Nonpolar compounds tend to have weaker interactions with water molecules and are typically less soluble in water compared to polar compounds.
Therefore, based on the polarity and ability to form hydrogen bonds, propanal would be expected to be the most soluble in water.
Hence, B. is the correct option.
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--The given question is incomplete, the complete question is
"Which of the following would be expected to be the most soluble in water? A) cyclobutane B) propanal C) not possible to decide."--
The Position Of An Object Free-Falling In Air Is Observed To Fit The Following Expression: \[ X=V_{0}\Left(T-T_{0}+T_{0} E^{-T / T_{0}}\Right) \] Where \( T_{0} \) Is Some Constant Reference Time, And \( V_{0} \) Is A Constant Characteristic Velocity, Also Known As The Terminal Velocity, Related To The Shape Of The Object. A) Find the expression for the velocity of the object. Why is vo called the terminal velocity?b) Find the expression for the acceleration of the object as a function of time, t. C) Find the expression for the acceleration of the object as a function of its velocity, v
Answers
According to the position of an object in free fall in the air, we answer the questions according to the expression mentioned above.
A) The expression for the velocity of the object can be found by taking the derivative of the position expression with respect to time. This gives:
\(\[ V=\frac{dX}{dT}=V_{0}\left(1-E^{-T / T_{0}}\Right) \]\)
The term \(\( V_{0} \)\) is called the terminal velocity because it represents the maximum velocity that the object can reach as it falls. As time goes on, the velocity approaches this value, but never exceeds it.
B) The expression for the acceleration of the object can be found by taking the derivative of the velocity expression with respect to time. This gives:
\(\[ A=\frac{dV}{dT}=V_{0}\left(\frac{E^{-T / T_{0}}}{T_{0}}\Right) \]\)
C) The expression for the acceleration of the object as a function of its velocity can be found by rearranging the velocity expression and then substituting it into the acceleration expression. This gives:
\(\[ T=-T_{0}\ln\left(1-\frac{V}{V_{0}}\right) \]\)
\(\[ A=V_{0}\left(\frac{E^{-T / T_{0}}}{T_{0}}\Right)=V_{0}\left(\frac{1-\frac{V}{V_{0}}}{T_{0}}\Right)=\frac{V_{0}-V}{T_{0}} \]\)
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Give the ground state electron configuration for sr.
a. [kr]5s25d105p2
b. [kr]5s2 [kr]5s24d10
c. [kr]5s24d105p2
d. [kr]5s24d2
Answers
The correct ground state electron configuration for Sr (strontium) is:
d. [Kr]5s^24d^2.
In the electron configuration, [Kr] represents the noble gas krypton, which comes before strontium in the periodic table and accounts for the filled electron shells prior to strontium. The 5s^2 portion indicates that there are two electrons occupying the 5s orbital, which are the valence electrons of strontium.
Following the noble gas notation, we start with the electron configuration of krypton: [Kr] = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6.
To complete the electron configuration for strontium, we add the remaining electrons. The 5s orbital is lower in energy than the 4d orbital, so the 5s electrons are added before the 4d electrons. Thus, we have [Kr]5s^2.
Finally, since strontium has an atomic number of 38, its full electron configuration is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^2.
This electron configuration accurately represents the distribution of electrons within strontium in its ground state, indicating the specific orbitals and the number of electrons present in each.
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Strontium (Sr)'s precise ground state electron configuration is [Kr]5s2, which is represented by option b in the notation for electron configurations.
Explanation:The distribution of electrons in the ground state electron configuration of strontium (Sr) depicts the atomic structure of that element.. The electron configuration for a ground state Sr atom is [Kr]5s2. In this configuration, 'Kr' represents a core of electrons identical to that in a krypton atom, and '5s2' indicates two electrons in the 5s subshell. This correct answer aligns with option b [kr]5s2. The core notation [Kr] helps simplify the representation of the electron configuration.
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Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule? monosaccharide disaccharide monomer starch
Answers
Explanation:
lactose is disaccharide
because it contains 1 monosaccharide galactose +
1 monosaccharide glucose
The correct answer to the question is: disaccharide
Monosaccharides are simple sugar which can not be hydrolysed into simpler or smaller molecules.
Disaccharides are sugars produced by the condensation of two monosaccharides with the elimination of a water molecule.
monosaccharide + monosaccharide <=> Disaccharide + waterA Monomer is a small molecule which can combine with other similar molecules to form a large molecule called polymer. Thus, a monomer of starch is simply a small molecule that combines together to form a polysaccharide called starch. The monomer of starch is glucose.
Glucose and galactose combined to form lactose i.e
Glucose + Galactose => LactoseThe above is simply a demonstration of how disaccharides are produced.
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Difference between Displacement and Double Displacement reaction
Answers
Answer:
please follow me
Explanation:
A displacement reaction is the one when a more reactive substance displaces a less reactive one from its salt solution whereas a double displacement reaction is the one where a mutual exchange of ions happens between two compounds.
What causes soil damage and loss?
Answers
Answer:
Mosty Oil but it depends there is lots of things that can damage soil
Explanation:
Answer:
Sheet erosion by water, wind erosion, and rill erosion
which formula represents an asymmetrical molecule
Answers
Answer:
Explanation:
An asymmetrical molecule is a molecule that has non-superimposable mirror images. In other words, the molecule cannot be superimposed on its own mirror image.
One way to represent an asymmetrical molecule is with the formula R-L, where R and L represent different groups attached to a central carbon atom. This formula indicates that the molecule has a chiral carbon, which is a carbon atom that is bonded to four different groups. Because the groups attached to the carbon atom are different, the molecule is asymmetrical.
Another way to represent an asymmetrical molecule is with the formula (R,R)-(S,S), where R and S represent different groups attached to a central carbon atom. This formula indicates that the molecule has two chiral carbons, each of which is bonded to two R groups and two S groups. Because the groups attached to the carbons are different, the molecule is asymmetrical.
Overall, the exact formula for an asymmetrical molecule will depend on the specific groups attached to the central carbon atom(s) and the arrangement of those groups.
a. Which blood type is universal donor? A,B,AB or O pick
B. The universal donor Is the only blood type that can donate or receive? Pick Blood to or from? Pick any other blood group.
C. The universal recipient is the only blood group that can ____ pick donate or receive blood to or from pick, any other blood group.
Answers
Answer:
Blood type O is the universal donor.
The Universal donor is the only blood type that can donate blood to any other blood group. The universal recipient is the only blood group that can receive blood from any other blood group.
-TheUnknownScientist 72
Who was the Russian chemist that arranged the elements of the periodic table in order of increasing atomic mass?
Answers
Answer:Dmitri Mendeleev
Explanation:
how many moles of H are there in 39.2g of H
Answers
Answer:
39.2 g
Explanation:
because moles = mass / mr (mr of h is 1)
so 39.2/1= 39.2 moles
hope this helps you to understand :)
What is not a product of modern chemistry ?
Answers
Answer:
Modern chemistry describes the composition, structure, and physical and chemical properties of substances. ... The main aim of modern chemistry is to improve the communication and conversation among the scientists, researchers, engineers, and policymakers, who are working under the area of modern chemistry
Explanation:
I hope this helps you!!
According to the graph,
what part(s) of the
reaction are present at
the beginning of the
reaction?
Concentration (M)
Reaction: 2A A₂
A. only the reactant, A
B. only the product, A:
C. Both the reactant (A) and product (A:)
D. You cannot determine from the graph.
Time (sec)
4
Answers
According to the graph, only the reactant A was present at the beginning of the reaction.
What does the graph show?The graph shows the concentration for the reactant A and the product that is A2. In this graph, the concentration is displayed on the vertical axis, while the horizontal axis shows the time.
In general terms, it can be observed that at the beginning only the reactant A is present, but as the reaction occurs the concentration of this reactant decreases, while the concentration of the product A2 increases.
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the pull of gravity of ______ (choices: the moon only, the sun only, the moon and sun) causes Earth’s crust and oceans to bulge. This creates high and low tides.
_____ (choices: Spring, Neap, Seasonal) tides occur when the Sun, the moon, and Earth are nearly aligned. ____ (choices: spring, neap, seasonal) tides happen when the Sun and the moon are at right angles to each other. Each of these special tides happens ____ (choices: once, twice, four times) in a lunar cycle.
Answers
Answer: the moon and sun
Explanation:
Would you recommend storing nuclear waste near natural resources? Explain why or why not.
Answers
Answer:
No
Explanation
I say no because that could possibly put many species of animals i danger of nuclear reaction. Not only would it put many animals in danger it would put humans plant and most likely make that area a toxic waste for years
Answer:
No
Explanation:
A carbocation is all of the following, except O a positively charged species. O a reactive intermediate. O an electrophile. O a nucleophile.
Answers
participates in a chemical reaction by accepting an electron pair in order to bond to a nucleophile.
What are nucleophile and example?A nucleophile is a reactant which gives an electron pair to form a covalent bond. A nucleophile is usually charged negatively or is neutral with a lone couple of donatable electrons. H2O, -OMe or -OtBu are some examples. Overall, the electron-rich species is a nucleophile.
What is electrophile and nucleophile?Electrophiles are electron deficient species and can accept an electron pair from electron rich species. Examples include carbocations and carbonyl compounds. A nucleophile is electron rich species and donates electron pairs to electron deficient species. Examples include carbanions, water , ammonia, cyanide ion etc.
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Calculate the pH of each of the following solutions of a strong acid in water.
(a) 0.16 M HCl
(b) 4.4 M HClO4
(c) 2.3???10?11 M HI
Answers
The pH of each of the following solutions of a strong acid in water for (a) 0.16 M HCl is 0.78, (b) 4.4 M HClO4 is 3.35, (c) 2.31011 M HI is 10.64.
A strong acid is an acid that is completely ionized in water. Therefore, the pH of a solution of a strong acid in water can be calculated using the following formula:
pH = -log[H+]
(a) 0.16 M HCl:
= [H+]
= 0.16 M
pH
= -log(0.16)
= -(-0.78)
= 0.78
(b) 4.4 M HClO4:
[H+]
= 4.4 M
pH
= -log(4.4)
= -(0.35)
= 3.35
(c) 2.3 x 10^-11 M HI:
[H+]
= 2.3 x 10^-11 M
pH
= -log(2.3 x 10^-11)
= -(-10.64)
= 10.64
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There is an extreme temperature difference between day and night in a desert during clear weather. However, even though the outside temperature drops greatly at night, the water in a swimming pool in the desert tends to remain warm. Use your knowledge of heat energy, specific heat, and heat transfer to explain these facts.
please help!!!!!!
Answers
Sand has a lower heat capacity hence it heats up easily and looses heat easily. On the other hand, water has a higher heat capacity and looses heat more slowly hence it remains warm at night.
What is heat transfer?The transfer of heat refers to the movement of heat from one body to another. We should note that sand has a low specific heat capacity hence it is rapidly heated up in the day and looses heat quickly at night.
On the other hand, water has a high specific heat capacity hence it heat up slowly and also does not loose heat easily even when the surrounding temperature is much colder. As such, there is an extreme temperature difference between day and night in a desert during clear weather and the water in a swimming pool in the desert tends to remain warm even when the outside temperature drops greatly at night.
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The resulting net force of an object is represented below. →10 N Which most likely represent the forces acting on the object?
Answers
Explanation:
.........................
Baking soda is sodium bicarbonate, NaHCO3, and vinegar is primarily acetic acid, HC2H3O2. When baking soda is added to vinegar, the resulting reaction produces a tremendous amount of gas, as shown in this video. NaHCO3(s) + HC2H3O2(aq) rightarrow Complete this equation for the reaction of NaHCO3(s) with HC2H3O2(aq). Include phase symbols. NaHCO3(s)+ HC2H3O2(aq) rightarrow
Answers
NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)
This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate.
The balanced equation for the reaction of NaHCO3(s) with HC2H3O2(aq) including phase symbols is
NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)
Baking soda, also known as sodium bicarbonate, is a white, crystalline powder with the chemical formula NaHCO3. It is an alkaline substance that neutralizes acids.
Vinegar is mostly composed of acetic acid, HC2H3O2, which is a weak acid. Vinegar has a sour flavor and a strong smell due to the presence of acetic acid.
NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq) This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate. When the baking soda and vinegar are combined, a chemical reaction occurs, causing carbon dioxide gas bubbles to form. This is due to the reaction between the acid and base in the mixture, which generates carbon dioxide gas as a byproduct. This reaction is commonly used in baking as a leavening agent to make cakes, muffins, and other baked goods rise.
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