If the initial metal sulfide precipitate is black with traces of yellow, what metal ion is likely to be present
Answers
1: If the initial metal sulfide precipitate is black with traces of yellow, the likely ion present is Lead (II) ion (Pb2+). 2: The metal ion that will not form a precipitate with 52- ion in an acidic solution is Copper (II) ion (Cu2+). 3: The metal ion that appears in both Group II and Group I is Lead (II) ion (Pb2+). 4: The metal sulfides that are soluble in NaOH are SnS2 (Tin(IV) sulfide) and PbS (Lead(II) sulfide). 5: The resulting color after adding NH3 solution into the Cu2+ solution is deep blue.
1: If the initial metal sulfide precipitate is black with traces of yellow, the likely ion present is Lead (II) ion (Pb2+). This is because lead sulfide (PbS) is a black precipitate, and the presence of yellow traces could indicate the formation of lead(II) sulfide mixed with other impurities.
2: The metal ion that will not form a precipitate with 52- ion in an acidic solution is Copper (II) ion (Cu2+). This is because copper(II) ions do not readily react with chloride ions (52-) in an acidic solution to form a precipitate. Other metal ions like iron (Fe2+), lead (Pb2+), and tin(IV) (Sn4+) can form precipitates with chloride ions.
3: The metal ion that appears in both Group II and Group I is Lead (II) ion (Pb2+). Lead (II) is a transition metal that can exhibit properties similar to both Group II metals (alkaline earth metals) and Group I metals (alkali metals).
4: The metal sulfides that are soluble in NaOH are SnS2 (Tin(IV) sulfide) and PbS (Lead(II) sulfide). Both tin(IV) sulfide and lead(II) sulfide can react with sodium hydroxide (NaOH) to form soluble complexes, which means they dissolve in NaOH solution.
5: The resulting color after adding NH3 solution into the Cu2+ solution is deep blue. Copper(II) ions (Cu2+) form a complex with ammonia (NH3) called tetraamminecopper(II) complex, [Cu(NH3)4]2+. This complex has a deep blue color, hence the resulting color change.
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Complete question is:
"Question 1 g If the initial metal sulfide precipitate is black with traces of yellow, what lon is likely to be present? Tin(IV) on Lead (H) ion Copper (1) ion Bistmuth (1) lon Question 2 Which metal ion will not form precipitate with 52. ion in a acidic solution Iron (1) Copper (II)ion Lead (1) ion Tin(IV) ion Question 3 Which metal ion appears in group II also appears in group I? Lead (1) ion Tin(IV) ion Copper (1) lon Iron (1) Question 4 0.4 pts What metal sulfides are soluble in NaOH? SnS2 PbS Cus BIS Question 5 0.4 pts What is the resulting color after adding NH3 solution into the Cu2+ solution? O deep blue deep red colorless O yellow"
Related Questions
i need help answering this question on my homework, could anyone help?
Answers
but a hydrogen gas is H2
H2 is the answer
Jerod used a golf club to hit a ball what was the action and reaction
Answers
Answer: I'm pretty sure the action is Jerod swinging the golf club and the reaction is hitting the ball
Explanation:
What is the specific heat of a substance that has a mass of 15.0 g and requires
60.0 calories to raise its temperature by 25.0°C?*
Answers
Answer:
0.16 cal/g°C
Explanation:
The following data were obtained from the question:
Mass (M) = 15 g
Heat (Q) = 60 calories
Temperature change (ΔT) = 25 °C
Specific heat capacity (C) =..?
We, can obtain the specific heat capacity of the substance as shown below:
Q = MCΔT
60 = 15 × C × 25
60 = 15 × 25 × C
60 = 375 × C
Divide both side by 375
C = 60/375
C = 0.16 cal/g°C
Therefore, the specific heat capacity of the substance is 0.16 cal/g°C
Which of these pure substances do you think are Elements?
Au (Gold)
C6H12O6 (Sugar)
Fe (Iron)
NaCl (Salt)
O (Oxygen)
Fe2O3 (Rust)
Answers
The others are compounds
Define unknown solutions
Answers
Answer:
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. Typically, the titrant (the know solution) is added from a buret to a known quantity of the analyte until the reaction is complete
esters and amides are most easily made by nucleophilic acyl substitution reactions on ________? A.on alcohols. B.acid anhydrides. C.carboxylates. D.carboxylic acids. E.acid chlorides.
Answers
Esters and amides are most easily made by Nucleophilic acyl substitution reaction on Alcohols.
The reaction that involves in the bond formation of acyl group is called Nucleophilic substitution reaction. The Nucleophilic acyl substitution reaction is a reaction where a nucleophile forms a new bond with the carbonyl carbon of an acyl group with accompanying breakage of a bond between the carbonyl carbon and a leaving group. This reaction is called as a substitution reaction because the forming and breaking a bond on the same carbon occurs. The functional groups which undergo nucleophilic acyl substitutions are called carboxylic acid derivatives. these include carboxylic acids themselves carboxylates, amides, esters, thioesters, and acyl phosphates. Esters and amides are made by nucleophilic acyl substitution reaction.
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what is the formula of the hydride formed by aluminum
Answers
The formula of the hydride formed by aluminum is AlH3.A hydride is a compound that is formed by hydrogen and a less electronegative element, according to Chemistry.
In this case, the hydride is formed by aluminum, hence it is referred to as aluminum hydride.The formula of aluminum hydride is written as AlH3. It contains one aluminum atom and three hydrogen atoms. It is important to note that the ratio of aluminum to hydrogen in aluminum hydride is 1:3,
The bonding between aluminum and hydrogen in aluminum hydride is considered to be mostly covalent rather than ionic because aluminum is a metalloid and hydrogen is a nonmetal.
A bond between a metal and a nonmetal is usually ionic in nature. However, aluminum and hydrogen do not have enough of a difference in electronegativity for them to form an ionic bond. As a result, the bond is considered to be covalent.
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Jen is walking her dog at a constant rate.
They keep a constant rate as they turn a
corner. Why has their velocity changed?
Answers
Answer:
4is the answer
Explanation:
How many Chromium are in Cr(CO3)3?
Answers
Answer:
Maybe like 6!
Explanation:
___AsCl3+____H2S-->___As2S3+___HCI
Answers
Answer:
2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl
Explanation:
When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.
We usually balance O and H atoms last.
AsCl₃ + H₂S → As₂S₃ +HCl
reactants
As --- 1
Cl --- 3
H --- 2
S --- 1
products
As --- 2
Cl --- 1
H --- 1
S --- 3
2 AsCl₃ + H₂S → As₂S₃ +HCl
reactants
As --- 2
Cl --- 6
H --- 2
S --- 1
products
As --- 2
Cl --- 1
H --- 1
S --- 3
The number of As atoms is now balanced.
2 AsCl₃ + 3 H₂S → As₂S₃ +HCl
reactants
As --- 2
Cl --- 6
H --- 6
S --- 3
products
As --- 2
Cl --- 1
H --- 1
S --- 3
The number of S atoms is now equal on both sides.
2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl
reactants
As --- 2
Cl --- 6
H --- 6
S --- 3
products
As --- 2
Cl --- 6
H --- 6
S --- 3
The equation is now balanced.
What is a polar molecule?
A. A molecule with symmetrical polar covalent bonds
B. A molecule with symmetrical nonpolar covalent bonds
C. A molecule with a negative pole and a positive pole
D. A molecule with two atoms of the same electronegativity
Answers
Explanation:
A molecule with a negative pole and a positive pole is called a polar molecule.
(d) A molecule with two atoms of the same electronegativity
What is meant by a polar molecule?A polar molecule is usually formed when the one end of the molecule is said to possess more positive charges and whereas the opposite end of the molecule has negative charges, creating an electrical pole.
What is a polar molecule example? Water (H2O) is a polar molecule. The bonds between hydrogen and oxygen are distributed so that the hydrogen atoms are both on one side of the oxygen atom rather than evenly spaced.Sodium Chloride (NaCl) which is an ionic compound acts as a polar molecule. Usually, the large difference in electronegativities in sodium and chlorine makes their bond polar.Learn more about polar molecule on https://brainly.com/question/11405437
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label the general phases of the carbon cycle. drag the appropriate labels to their respective targets.
Answers
The photosynthesis, respiration, exchange, sedimentation, extraction, and burning are the six main steps in the carbon cycle.
The majority of these include CO2, which is a type of carbon. Through the process of photosynthesis, the Sun's energy is brought to Earth and used by primary producers like plants.
Nature uses the carbon cycle to recycle the carbon atoms that continually flow from the atmosphere into Earth's living organisms and back again.
The majority of carbon is kept in rocks and sediments; the remainder is kept in the ocean, atmosphere, and living things. The terrestrial and aquatic carbon cycles make up the carbon cycle in nature. The flow of carbon within marine habitats is addressed by the aquatic carbon cycle.
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HELP!!GIVING BRAINLIEST!! TIME SENSETIVE!!!
Here are some basic lab safety rules. Read through them and write at least a page. THEY ARE OBVIOUSLY ALL IMPORTANT...GO INTO DETAIL ABOUT A FEW AND ELABORATE ON THEIR IMPORTANCE.
Know locations of laboratory safety showers, eye wash stations, and fire extinguishers. The safety equipment may be located in the hallway near the laboratory entrance. Know emergency exit route.
Answers
Answer:
wait so what am I supposed to do
Answer:
Explanation:
Knowing locations of laboratory safety showers is important because you could have spilled some dangerous chemical on your skin. Knowing where the eye washing stations is important if you get something dangerous in your eyes. Knowing where the fire extinguisher is also important because if there is a fire and you cannot evacuate, you have a good chance of putting it out with the fire extinguisher. Knowing the emergency exit route is important because if there is a fire or something along those lines, you need to evacuate as soon as possible and not be searching for exits, you should be on the move.
what is the formula for water
Answers
Answer:
H2O
Explanation:
EASIEST FORMULA ON EARTH
In the arrhenius equation, the collision frequency and molecular orientation are incorporated in the value of?
Answers
The collision frequency and molecular orientation are incorporated in the value of the activation energy (Ea) in the Arrhenius equation.
The Arrhenius equation is a mathematical expression that describes the temperature dependence of reaction rates. It states that the rate constant (k) of a chemical reaction is directly proportional to the frequency of successful collisions between reacting molecules, and is given by the equation:
k = Ae^(-Ea/RT),
where A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.
This equation predicts that as the temperature increases, the reaction rate will also increase due to the increase in collision frequency and molecular orientation, which are both incorporated in the activation energy (Ea).
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which can occur in a physical changen?
Answers
william aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each
Answers
The given statement " William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms" is false.
The mass spectrograph was not invented by William Aston. It was actually invented by J.J. Thomson in the early 20th century.
J.J. Thomson's work with the mass spectrograph led to the discovery of isotopes, which are different forms of an element with the same number of protons but different numbers of neutrons. Isotopes have different masses, and the mass spectrograph allowed scientists to separate and analyze them based on their mass-to-charge ratio.
The process of using a mass spectrograph to determine the mass and percent abundance of isotopes is known as mass spectrometry. It involves ionizing a sample, separating the ions based on their mass-to-charge ratio, and detecting the ions to determine their abundance.
The completed question is given as,
State true or false
William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms.
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Stars like the sun emit energy from nuclear fusion which combines small nuclei of hydrogen into larger nuclei of helium. All matter in the universe is created from stars. Which of these creates heavier elements like copper and zinc?.
Answers
The kind of stars that creates heavier elements such as copper and zinc is the first-generation stars. More specifically, the explosions (supernovae) that these stars underwent.
The first-generation stars were the stars that were formed after the Big Bang happened. These stars consisted mainly of hydrogen and helium. When these stars exploded in supernovae, that explosion creates some heavier elements that exist in the universe, such as copper and zinc.
The stars that came after the first generation, the second-generation stars like our Sun, contain these heavy elements. Since these elements can't exist purely from the nuclear fusion inside stars, they must have come from the supernovas.
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40. 0% carbon, 6. 7% hydrogen, and 53. 3% oxygen with a molecular mass of 60. 0 g/mol. What is the molecular formula of the unknown compound?
Answers
The molecular formula of the unknown compound is C2H2O2.
To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.
Given:
Percentage of carbon = 40.0%
Percentage of hydrogen = 6.7%
Percentage of oxygen = 53.3%
Molecular mass = 60.0 g/mol
Step 1: Convert the percentages to grams.
Assuming we have 100 grams of the compound:
Mass of carbon = 40.0 g
Mass of hydrogen = 6.7 g
Mass of oxygen = 53.3 g
Step 2: Convert the masses to moles using the molar masses of the elements.
Molar mass of carbon = 12.01 g/mol
Molar mass of hydrogen = 1.008 g/mol
Molar mass of oxygen = 16.00 g/mol
Number of moles of carbon = Mass of carbon / Molar mass of carbon
= 40.0 g / 12.01 g/mol
= 3.332 mol
Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen
= 6.7 g / 1.008 g/mol
= 6.648 mol
Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen
= 53.3 g / 16.00 g/mol
= 3.331 mol
Step 3: Determine the empirical formula by dividing the moles by the smallest value.
Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.
So, the empirical formula of the compound is CHO.
Step 4: Determine the multiple of the subscripts to obtain the molecular formula.
To find the multiple, we divide the molecular mass by the empirical formula mass.
Molecular mass = 60.0 g/mol
Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol
Multiple = Molecular mass / Empirical formula mass
= 60.0 g/mol / 29.018 g/mol
= 2.07
Rounding to the nearest whole number, we get 2.
Therefore, the molecular formula of the unknown compound is C2H2O2.
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pls help science problem
Answers
The calculated wavelength and amplitudes of waves are as 0.5 m: Wavelength: 0.5 m, Frequency: 1/4 Hz, Amplitude: 0.5 m
1.0 m: Wavelength: 1.0 m, Frequency: 1/2 Hz, Amplitude: 1.0 m
1.5 m: Wavelength: 1.5 m, Frequency: 3/4 Hz, Amplitude: 1.5 m
2.0 m: Wavelength: 2.0 m, Frequency: 1 Hz, Amplitude: 2.0 m
How do you determine a wave's amplitude, wavelength, and frequency?By looking at the properties of a wave, one can determine its amplitude, wavelength, and frequency.
The wave's maximum displacement from its equilibrium position is known as its amplitude, and it is typically measured in meters (m). Measured in meters (m), the wavelength is the distance between any two successive points in the same phase of the wave.
The number of complete wave cycles that pass through a given point in a given amount of time is known as the frequency, and it is measured in hertz (Hz). Measure the maximum displacement, the distance between two wave crests, and the number of wave cycles that occur over a given time period in order to determine a wave's amplitude, wavelength, and frequency.
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Consider the chemical equation. CuCl2 2NaNO3 Right arrow. Cu(NO3)2 2NaCl What is the percent yield of NaCl if 31. 0 g of CuCl2 reacts with excess NaNO3 to produce 21. 2 g of NaCl? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100. 49. 7% 58. 4% 63. 6% 78. 7%.
Answers
Answer:
78.7%
Explanation:
NEED HELP
What is the temperature in kelvin of a gas if it is allowed to expand from 1.50 L to 4.50 L? The initial temperature is 10.0°C and pressure is constant throughout the change. Which equation should you use?
Answers
Answer:
Explanation:
V1/T1 =V2/T2 at constnant pressure
Answer:
c
Explanation:
ANSWER QUICKLY PLEASE I GIVE BRAINLIEST
Answers
Answer:
characteristic of a good claim:
1. written in complete sentences
2. one sentence
3. answers one question
4. is stated as a fact
5. doesn't attempt to explain the claim
not a characteristic of a good claim:
1. multiple sentences
2. does not contain punctuation
3. answers multiple questions
4. starts with "i think"
5. attempts to explain the claim
6. uses weak words like "probably"
Explanation:
it is what it is
3. Which of the following best describes the difference in the results of mitosis and
meiosis?
a. Mitosis results in daughter cells with a
complete set of genes. Meiosis
results in daughter cells with half the
genes.
b. Mitosis results in four daughter cells.
Meiosis results in only two daughter
cells.
c. Mitosis produces results in only a few
seconds. Meiosis produces results in
several hours.
d. Mitosis results in daughter cells with a
cell membrane. Meiosis results in
daughter cells with a cell wall.
4
Seycells have
Answers
Answer:
A
Explanation:
Mitosis makes 2 daughter cells so you know the answer is not b
Question 5 of 10
What are the substances you start with in a chemical reaction called?
A. The products
B. The mixture
C. The reactants
D. The intermediates
Answers
Answer:
c. the reactants
Explanation:
the reactants are specifically the substances consumed in the course of chemical reaction
Is it physically possible to create a chemical serum that would give you any sort of superpower??
Answers
Trying to make anything like that would ultimately kill you— it would have to be natural talent.
I hope this helped!
I would appreciate it if you gave me a Thanks and a great brainliest (:
A block of steel occupies a volume of 15.0 mL and weighs 120.75 g. What is its density?
Answers
The density of a block of steel is:
8.05g/mL.
The mass of a substance per unit of volume is that the definition of density. though the sign may represent the Latin letter D, it's most often accustomed represent density. Mass divided by volume is however density is mathematically outlined.
The units of mass divided by volume accustomed live density embody grammes per cm cube (g/cm3) and kilogrammes per liter .
The equation for density is d = M/V, wherever d represents density, M is mass, and V is volume.
As a result, so as to calculate density, we tend to should divide mass by volume.
The mass is one hundred 20.75 and therefore the volume is 15.0 ml.
Divided by 120.75/15.0
8.05g/mL is the density.
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What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?
Use P V equals n R T. and R equals 8.314 StartFraction L times kilopascals over moles time K EndFraction..
Answers
3.3256 Liters
See the image I have shared to you above
Answer:
B. 7.2k
Explanation:
took the test ;)
Which type of sedimentary rock is pictured here?
Answers
Answer: there is no photo so we can’t answer it:)
Explanation:
Answer: organic
Explanation:
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 2-butanol as the MAJOR product. O Your do not have to consider stereochemistry. O You do not have to explicitly draw H atoms.
O If more than one structure fits the description, draw them all. O Draw one structure per sketcher. Add additional sketchers using the dropdown menu in the bottom right corner. O Separate structures with + signs from the dropdown menu.
Answers
The alkene structure that undergoes acid-catalyzed hydration without rearrangement to give 2-butanol as the major product is:
CH₃CH=CHCH₃
Which alkene structure gives 2-butanol upon acid-catalyzed hydration?Acid-catalyzed hydration is a reaction in which an alkene reacts with water in the presence of an acid catalyst to form an alcohol. In this case, we want to obtain 2-butanol as the major product without any rearrangement. The given alkene, CH₃CH=CHCH₃, meets this criterion.
When this alkene undergoes acid-catalyzed hydration, the double bond is broken, and water adds to the carbon atoms, resulting in the formation of 2-butanol. No rearrangement of the carbon skeleton occurs during the reaction, ensuring that 2-butanol is the major product. Acid-catalyzed hydration and alkene reactions for further understanding.
Learn more about:Acid-catalyzed hydration
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