Could this technique (indicator titration) determine if a lake or stream is affected by acid rain? For example, would this technique allow you to say if the lake or stream was acidified from local industrial facility runoff versus acid rain? Does this type of titratin give clues about the source of the acids present?
Answers
Indicator titration can indeed be used to determine if a lake or stream is affected by acid rain. This technique involves adding a small amount of an indicator substance to a water sample and then slowly adding a standardized solution of a base until the pH of the water changes.
The point at which the pH changes indicates the endpoint of the titration and can be used to calculate the acidity of the water sample.In terms of determining the source of the acids present, indicator titration alone may not be able to provide a definitive answer. However, if the water sample is taken from an area known to be affected by acid rain, and the acidity levels are found to be high, it is likely that the source of the acids is indeed acid rain. On the other hand, if the acidity levels are found to be high in an area not known to be affected by acid rain, further investigation may be necessary to determine the source of the acids, such as local industrial facility runoff. Overall, indicator titration can provide valuable clues about the presence and level of acidity in a water sample, but additional information may be needed to identify the specific source of the acids present.
To know more about Indicator titration, Visit;
https://brainly.com/question/31783897
#SPJ11
Related Questions
The excitation of electrons in the light reactions creates energy for which two processes? a) The synthesis of ATP. b) The fixation of carbon. c) The pumping of protons to create a concentration gradient. d) The reduction of NADP+ to NADPH.
Answers
The excitation of electrons in the light reactions of photosynthesis generates energy for two key processes:
a) the synthesis of ATP
d) the reduction of \(NADP^{+}\) to NADPH.
During the light reactions of photosynthesis, light energy is absorbed by chlorophyll molecules in the thylakoid membranes of chloroplasts. This excites the electrons within the chlorophyll molecules, initiating a series of electron transfer reactions. The primary outcome of these electron transfers is the generation of energy-rich molecules ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
a) The excitation of electrons drives the synthesis of ATP through a process called photophosphorylation. As the excited electrons move through the electron transport chain, they release energy that is utilized by ATP synthase to convert ADP (adenosine diphosphate) and inorganic phosphate (\(P_{i}\)) into ATP.
d) The excitation of electrons also leads to the reduction of \(NADP^{+}\) to NADPH. The energized electrons are passed through a series of electron carriers and eventually transferred to \(NADP^{+}\), along with protons (\(H^{+}\)). This reduction reaction converts \(NADP^{+}\) into NADPH, which acts as a high-energy electron carrier used in the subsequent dark reactions (Calvin cycle) to fix carbon dioxide and synthesize carbohydrates.
Thus, the excitation of electrons in the light reactions of photosynthesis provides energy for the synthesis of ATP through photophosphorylation and the reduction of \(NADP^{+}\) to NADPH. These energy-rich molecules are crucial for powering the subsequent dark reactions and the fixation of carbon dioxide to produce carbohydrates.
Learn more about reactions here:
https://brainly.com/question/28270550
#SPJ11
3. For the following balanced redox reaction answer the following questions 4NaOH(aq)+Ca(OH) 2
(aq)+C(s)+4ClO 2
( g)→4NaClO 2
(aq)+CaCO 3
( s)+3H 2
O(l) a. What is the oxidation state of Cl in ClO 2
( g) ? b. What is the oxidation state of C in C(s) ? c. What is the element that is oxidized? d. What is the element that is reduced? e. What is the oxidizing agent? f. What is the reducing agent? g. How many electrons are transferred in the reaction as it is balanced?
Answers
a. The oxidation state of Cl in ClO₂(g) is +3.
b. The oxidation state of C in C(s) is 0.
c. The element that is oxidized is Cl.
d. The element that is reduced is C.
e. The oxidizing agent is ClO₂.
f. The reducing agent is C.
g. To balance the equation, 3 electrons are transferred in each of the 4 half-reactions. Therefore, a total of 12 electrons are transferred in the reaction.
Oxidation and reduction are chemical processes that involve the transfer of electrons between reactant species. Oxidation refers to the loss of electrons by a reactant species, resulting in an increase in its oxidation state. Reduction, on the other hand, refers to the gain of electrons by a reactant species, resulting in a decrease in its oxidation state.
An easy way to remember these processes is through the mnemonic "OIL RIG", which stands for "Oxidation Is Loss, Reduction Is Gain". In an oxidation-reduction (redox) reaction, one species undergoes oxidation while another undergoes reduction.
Learn more about the oxidation and reduction: https://brainly.com/question/13699873
#SPJ11
Match each lab incident to the item of PPE that will protect you from it. Each item of PPE will only be used once.
While picking up a buret, an unknown solution left by a previous solution drips onto your hand._______________
While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor _______
While checking on a stirring solution, the solution splashes up towards your face. _______
While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench, __________
A. Gloves
B. Lab coat
C. Goggles
D. Closed-toe shoes
Answers
While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves
While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes
While checking on a stirring solution, the solution splashes up towards your face - Goggles
While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat
Explanation:
The full form of PPE is 'Personal Protective Equipment'.The PPE items we use in labs are : Lab coat: Protection of clothing and skin from accidental spilling of hot liquid or toxic substances. Gloves: Protection from hands from chemicals, hot objects, sharp tools, or electricityGoggles: Protection of the eye from any chemicals, toxic vapor, chemical debrisFace shield: Protection of the face from any chemicals, toxic vapor, chemical debrisClosed-toe shoes: Protection from feet from chemicals, hot objects, sharp tools, or electricitySo, according to the question. the matches will be:
While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves
While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes
While checking on a stirring solution, the solution splashes up towards your face - Goggles
While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat
Learn more about PPE here:
brainly.com/question/7991933?referrer=searchResults
brainly.com/question/18056380?referrer=searchResults
what natural resources are used to make plastic bags
Answers
Answer:patrolieum
Explanation:
Which of the following descriptions and/or equations best represent the enthalpy change of a system? There may be more than one correct answer.Choose one or more:A. The sum of the internal energy and the pressure-volume product of a system B. The heat absorbed or released during a phase change or chemical reaction at constant volume C. The heat absorbed or released during a phase change or chemical reaction at constant pressure D. The amount of energy required to raise the temperature of 1 mole of a substance by 1°C at constant pressure E. ΔH = ΔE + PΔVF. H = E + PVG. ΔE = q + wH. The work done on or by a phase change or chemical reaction at constant pressure F. H = E + PVG. ΔE = q + wH. The work done on or by a phase change or chemical reaction at constant pressure
Answers
The following descriptions and/or equations best represent the enthalpy change of a system: C. The heat absorbed or released during a phase change or chemical reaction at constant pressure; E. ΔH = ΔE + PΔV; F. H = E + PV.
Enthalpy (H) is a thermodynamic property that represents the total heat content of a system. It takes into account both the internal energy (E) of the system and the work done by or on the system in the form of pressure-volume work (PV).
Option C states that enthalpy change occurs during a phase change or chemical reaction at constant pressure. This is because at constant pressure, the heat absorbed or released by the system is equal to the change in enthalpy.
Option E, ΔH = ΔE + PΔV, represents the equation for calculating the change in enthalpy, where ΔE is the change in internal energy and PΔV is the pressure-volume work done.
Option F, H = E + PV, directly defines enthalpy (H) as the sum of internal energy (E) and pressure-volume work (PV).
These options highlight the relationship between enthalpy, internal energy, and work in the context of phase changes, chemical reactions, and constant pressure conditions.
To learn more about enthalpy change of a system, here
https://brainly.com/question/31635338
#SPJ4
if the solution described in the introduction is cooled to 0 ∘c what mass of k2so4 will crystallize?
Answers
0.54 g of K2SO4 will crystallize when the solution is cooled to 0 degree celsius.
Weight of KNO3= 51 g
Weight of K2SO4= 9 g
Weight of Water= 130 g
When the mixture is added to water, we get a solution.
Now, the solution is cooled to 0 °C.
Therefore, the solubility of KNO3 and K2SO4 decreases at this temperature, and they start to crystallize.
In other words, KNO3 and K2SO4 will start to crystallize at 0 °C, and the solubility of these salts at this temperature is given in the table below;
Substance Solubility at 0°C (g/100 g H2O)
KNO3 10.6
K2SO 41.8
Let's calculate the mass of K2SO4 that will crystallize.
The mass of the remaining K2SO4 in the solution will be the initial mass minus the mass of K2SO4 that crystallizes.
mass of K2SO4 = initial mass - mass of K2SO4 that crystallizes
mass of K2SO4 = 9 - mass of K2SO4 that crystallizes
We know that the mass of KNO3 in the solution is 51 g, and its solubility at 0 °C is 10.6 g/100 g of water.
Therefore, the amount of KNO3 that crystallizes will be;
KNO3 that crystallizes = 51 - (130/100) × 10.6
KNO3 that crystallizes = 51 - 13.78
KNO3 that crystallizes = 37.22 g
The mass of the remaining solution after crystallization of KNO3 is;
mass of the remaining solution = 130 - 100
mass of the remaining solution = 30 g
Now, using the amount of solution that is left, we can calculate the mass of K2SO4 that will crystallize.
Mass of K2SO4 that crystallizes = solubility of K2SO4 x Mass of water
Mass of K2SO4 that crystallizes = 1.8 g/100 g x 30 g
Mass of K2SO4 that crystallizes = 0.54 g
Therefore, 0.54 g of K2SO4 will crystallize.
Learn more about solution at: https://brainly.com/question/25326161
#SPJ11
What do you think of when you hear the word science? How would you define it?
Answers
Science is hypothesizing research in order to confirm if the experimentations are true or not.
If two identical atoms are bonded together, what kind of molecule is formed?
A. A bent, nonpolar molecule
B. A linear, polar molecule
C. A linear, nonpolar molecule
D. A linear, ionic molecule
Answers
Answer:
C. A linear, nonpolar molecule
Explanation:
Molecules which are alike usually have the same degree of pull which results in them sharing electrons. This sharing of electrons is known as the molecules exhibiting Covalent bonding between them.
The equal pull also results in the cancelling out of electrons and favoring non polar bonds due to the absence of free electrons which would have been able to interact with H2O in a polar binding system.
Answer:
C
Explanation:
APEX
a chemical reaction in which bonds are broken is usually associated with
Answers
the release of energy
If the spheres represent an atom
and an anion of the same element, which sphere represents the atom?
Select one:
Answers
Answer:
a is the answer I know and if I'm right mark me brainlest
Which term describes this molecular shape?
Answers
Answer:
B.) Trigonal planar
Explanation:
This molecule has 3 bonds and no lone pairs. The angles are all 120° and the bonds are within the same plane. These molecules have the molecular shape of trigonal planar.
CHEMISTRY PUNKS PLEASE HELP ME OUT!!!!!!!!!!!!!!!!! PLS. ILL LOVE U FOREVER N EVER! any point stealers will be reported <3
Answers
Answer: 25.0 L
Explanation:
For this problem, we will need to use Boyle's Law.
Boyle's Law: P₁V₁=P₂V₂
Since we are looking for V₂, we can rewrite the equation.
V₂=P₁V₁/P₂
The pressure should be in atm, so let's convert kPa to atm.
P₁=100 kPa=0.99 atm
P₂=200 kPa=1.97 atm
Now that we know the pressure in atm, we can plug it into the equation and solve.
\(V_{2} =\frac{(0.99 atm)(50.0L)}{1.97atm}\)
\(V_{2} =25.0 L\)
What mode of transportation is limited to specialized products such as liquids and gases?.
Answers
Transport via pipelines is only possible for specialist goods like liquids and gases.
Describe gas.Gas is a state of matter that lacks both a defined shape and volume. Compared to other states pf material, such as liquids and solids, gasses have a lower density. Particles, which have a great deal of kinetic energy but aren't very attracted to one another, are separated by a lot of free space.
Which 10 gases make up the majority of the atmosphere?The Earth's atmosphere is made up of approximately % ammonia, 21 percent oxygen, 0.93 % argon, 0.04 % carbon dioxide, and small traces of bright blue, helium, methane, krypton, ozone, and hydrogen in the form of water vapor, according to the educational website Vision Starting to learn (opens in new tab).
To know more about gases visit:
https://brainly.com/question/1369730
#SPJ4
how many liters of a 0.209m ki solution is needed to completly react with 2.43 g of cu(no3)2 according to the balanced chemical reaction
Answers
0.124L of 0.209m ki solution is needed to completely react with 2.43 g of cu(no3)2, by Stoichiometric coefficient
Stoichiometric coefficient is the number written in front of atoms, ion and molecules in a chemical reaction to balance the number of each element on both the reactant and product sides of the equation
Consider the following reaction
aA + bB → cC + dD , This reaction says that for a complete reaction a moles of A will react with b moles of B to produce c moles of C and d moles of D
The balanced reaction for the above given case will be
\(2Cu(NO_{3})_{2}\) + \(4KI\) → \(2CuI\) + \(I_{2}\) + \(4KNO_{3}\)
2.43 g of Cu(NO3)2 = 1.30 × \(10^{-2}\) moles.
Number of moles of KI = 2.60 × \(10^{-2}\) moles
To calculate the volume of KI needed, we use the formula
M = n OR V = n ⇒ 2.60 × \(10^{-2}\)
V M 0.209
V = 0.124L
To know more about Stoichiometric coefficient
https://brainly.com/question/15047541
#SPJ4
help me pls. the answer i got is 42.78 but it keeps saying it’s wrong
Answers
Answer: try 42.8
Explanation: you might have to round to 42.8 because of the significant figures
Balance the equation choose the coefficient for blank 3 (in front of KBr)___ KOH + ___ HBr --> ___ KBr + ___ H2O
Answers
Balancing the equation :
KOH(aq) + HBr(aq) --> KBr(aq) + H2O(l)
This is the balanced chemical reaction because it follows the following ionic reaction:
H ^(aq)+ + Br^(aq)- + K^+(aq) + OH ^- (aq) → K^+(aq) + Br^-(aq) + H2O (l)
I need to find the calculated error and calculated percent error how would I answer this ?
Answers
The absolute amount of the discrepancy or simply error between the measured value and the actual value is multiplied by 100 and divided by the actual value to determine the percent error.
How Can the Percent Error Be Found?Follow these easy procedures to determine the error rate-
1. Don't take into consideration any minus (-) signs when calculating the inaccuracy (by deducting the predicted value from the actual value). take the error's absolute value, etc.
Approximate Value - Exact Value = Absolute Error
2. Subtract the mistake from the accurate figure (sometimes, we may get a decimal number).
3. Relative error is the difference between the precise and approximative values.
4. Add a "%" following the conversion to a percentage (by multiplying by 100).
|Approximate Value - Exact Value|/Exact Value 100% Percent Error
To know more about Error and Percent error visit:
https://brainly.com/question/4170313
#SPJ9
the acidity of a solution reflects the concentration of free hydrogen ions in the solution. T/F?
Answers
True. the acidity of a solution reflects the concentration of free hydrogen ions in the solution.
The acidity of a solution is determined by the concentration of free hydrogen ions (H+) in the solution. When an acid dissolves in water, it releases H+ ions, which are responsible for the acidic properties of the solution.
The higher the concentration of H+ ions, the more acidic the solution is. Acidity is commonly measured using the pH scale, which quantifies the concentration of H+ ions in a logarithmic manner.
A lower pH value indicates a higher concentration of H+ ions and a stronger acidity, while a higher pH value corresponds to a lower concentration of H+ ions and a more alkaline (basic) solution.
Learn more about solutions here: brainly.com/question/1616939
#SPJ11
Plsss helpssssssssSSS
Answers
keep it simple i need helppppp
Answers
Answer: I believe it is 4
Explanation:
what will most likely happen to the United States population if reproduction patterns remain the same over the next 50 years?
Answers
Answer:
Explanation:
Mass Extinction
A sample of metal has a mass of 10.5 grams and a volume of 1.21 cm cubed. What is the density of the metal?
Answers
Answer:
\(\boxed {\boxed {\sf 8.68 \ g/cm^3}}\)
Explanation:
The density of a substance is its mass per unit volume. The formula for calculating density is:
\(\rho= \frac{m}{v}\)
The mass of the sample of metal is 10.5 grams. The volume of the sample of metal is 1.21 cubic centimeters.
m= 10.5 g v= 1.21 cm³Substitute these values into the formula.
\(\rho= \frac{ 10.5 \ g }{ 1.21 \ cm^3}\)
Divide.
\(\rho= 8.67768595 \ g/cm^3\)
The original measurements of mass and volume have 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 7 in the thousandth place (8.67768595) tells us to round the 7 up to an 8.
\(\rho \approx 8.68 \ g/cm^3\)
The density of the metal is approximately 8.68 grams per cubic centimeter.
Why would returning chemicals to a reagent bottle introduce contaminants?
Answers
Because the excess chemical compound can be contaminated with other chemical compound and some reaction can be happen thats why returning chemicals to a reagent bottle introduce contaminants.
There is a chance for the chemicals which is taken out from the reagent bottle to be contaminated with other substances. the chemical property of some of these chemicals may change on contact with air. all these factors may affect the quality of further reactions that were supposed to be carried out by these unused reagents
Know more about reagent bottle
https://brainly.com/question/28493984
#SPJ4
2. A gas container is initially at 40 mm Hg and 77K (liquid nitrogentemperature.) What will the pressure be when the container warmsup to room temperature of 298K?
Answers
ANSWER
The final pressure of the gas is 155mmHg
EXPLANATION
Given that:
The initial pressure of the gas is 40mmHg
The initial temperature of the gas is 77K
The final temperature of the gas is 298K
To find the final pressure, follow the steps below
In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.
Step1: Write the gas law at constant volume
\(\frac{P1}{T1}=\frac{P2}{T2}\)Step 2: Substitute the given data into the formula in step 1 to find P2
\(\begin{gathered} \frac{40}{77}=\frac{P2}{298} \\ \text{ Cross multiply} \\ \text{ 40}\times\text{ 298 }=\text{ 77}\times P2 \\ 11920\text{ }=\text{ 77}\times\text{ P2} \\ \text{ Divide both sides by P2} \\ \text{ P2 }=\frac{11920}{77} \\ P2\text{ }=154.8mmHg \\ P2\approx155mmHg \end{gathered}\)Hence, the final pressure of the gas is 155mmHg
In an sn2 reaction between bromomethane and hydroxide ion, the concentration of bromoethane is doubled and the concentration of hydroxide ion doubles the rate of reaction?
Answers
The rate of reaction in SN2 reaction becomes four times when the the concentration of bromoethane is doubled and the concentration of hydroxide ion doubles.
In SN2 reaction, the rate of reaction is depend on the concentration of both reactant.
For SN2 reaction,
r = k[bromoethane] [hydroxide ion]
r = k [CH3CH2Br] [OH]
When the concentration of bromoethane is doubled and the concentration of hydroxide ion doubles then,
r = k 2×[CH3CH2Br] × 2[OH]
r = 4k[CH3CH2Br] [OH]
Thus, we concluded that the rate of reaction in SN2 reaction becomes four times.
learn more about SN2 reaction:
https://brainly.com/question/27548297
#SPJ4
which of the following molecules can form hydrogen bonds? select one: a. ch4 b. nah c. nh3 d. bh3 e. hi
Answers
Answer:
nh3
Explanation:
:) let me know if its right!
The ocean floor, some parts of which get no sunlight, is the *
Answers
Answer:
Aphotic zone
Explanation:
Write the formula to calculate the bond order of molecule?
Answers
Bond order is equal to [((Bonding Molecules' Electron Number) - (Antibonding Molecules' Electron Number)] /2.
Chemistry's method for determining bond order is to divide the total number of electrons in the bonding molecules by the total number of electrons in the antibonding molecules. To obtain the result, divide the outcome by two. The stability of a molecule increases with bond order.
For instance, a hydrogen molecule is created when two hydrogen atoms come together (H-H or H2). H2 has a single bond, hence the bond order is one. Oxygen has a bond order of two (O=O or O2), and nitrogen has a bond order of three (NN or N2).
The number of chemical bonds that exist between two atoms is known as bond order. For instance, the bond order in acetylene is 3, but it is 3 in diatomic nitrogen (NN).
To learn more about bond order click here
https://brainly.com/question/29858800
#SPJ4
what caused the newt population to become more poisonous
Answers
Answer:
claim
Explanation:
CLAIM: The newt population became more poisonous because the snakes in this environment caused poison to be an adaptive trait, and Poison Level 10 is the most common because the newts with this trait were able to live longer and reproduce more than other newts.
Kinematics equation practice