Note the dynamic equilibrium in the photo provided. Which solution changes color when the pH of both solutions is increased? please explain
(chromate ion (left) and dichromate ion
(right))
Homework Answers
The above shown reaction works according to the LeChatellier's principle. As the pH of the solution is increased, the [H+] ion concentration decreases in the solution (OH- increases instead). So more of Cr2O7^2- (orange solution) gets converted into CrO4^2- (yellow solution). the reaction works in reverse fashion and reactants (left handside) are favoured.
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Note the dynamic equilibrium in the photo provided.
Which solution changes color when the pH of...
» What color did you observe after adding the 3M H2SO, solution? 4) What color did...
» What color did you observe after adding the 3M H2SO, solution? 4) What color did you observe after adding the IM NaOH solution? Assume that the dynamic equilibrium represented in the equation in I is present in the original solution you placed in the test tube. Based on LeChatelier's Principle, as stated above on page one, you will interpret the observations made in 2, above: (Note that H SO, produces H+ in solution.) a) When sulfuric acid was added,...
Answer questions #1-6 please Observations and Interpretations to be Handed In For Activity: Observations and Interpretations...
Answer questions #1-6 please
Observations and Interpretations to be Handed In For Activity: Observations and Interpretations 1) Balance the chromate / dichromate equilibrium equation: 2 Cro. (aq) + H(aq) + Cryo,'(aq) + H2O(1) (unbalanced equation) 2) What was the original color of the K,CrO solution? If the above equilibrium is established in the original solution, which species, Cro, (aq), or Cro" (aq) appears to be present in greatest amount? 3) What color did you observe after adding the 3M H2SO,...
7 8 and 9 6. Given the equilibrium pink blue When a solution of complex ion of Co* is heated, the solution becomes blue. (1 pt. each) a. Is AH for the forward reaction positive or negative? b. Whe...
7 8 and 9
6. Given the equilibrium pink blue When a solution of complex ion of Co* is heated, the solution becomes blue. (1 pt. each) a. Is AH for the forward reaction positive or negative? b. When the temperature is increased does the value for Kes Increase or decrease? 7. Acidified chromate solution is represented by the following equilibrium reaction (aq)+2 H(aq) Yellow 2 Cro CriO,2 (aq)+ HO (U) Orange Will this solution become yellow or orange is...
This is all the professor gave me, if there is extra information needed please let me...
This is all the professor gave me, if there is extra information
needed please let me know in the comments!
Prelab Assignment Name 25 pts 1. Consider the following equilibrium in aqueous solution 200,- (aq) + 2H (1) --- 6,0, (g) +H_O(1) In which the Cro, ion is yellow and the Co, is orange a. the color in basie solution should be 4 pts b. the color in acidic solution should be 4 pts e. To shift the equilibrium to...
Universal indicator is a solution which contains several acid base indicators and provided sufficient color changes to estimate pH over a wide range. One such indicator contains a mixture of thymol bl...
Universal indicator is a solution which contains several acid base indicators and provided sufficient color changes to estimate pH over a wide range. One such indicator contains a mixture of thymol blue, phenolphthalein, and methl orange. Determine the color of this indicator at a) pH=1.5, b) pH=4, c) pH 6.5, d) pH=9, and e) pH=11.5. Explain reasoning.
PLEASE HELP ME! ASAP PLEASE!! If you need anymore information, please ask. This is what we...
PLEASE HELP ME! ASAP PLEASE!! If you need anymore information,
please ask. This is what we were given and I am having trouble!
1) Saturated Sodium Chloride Solution Equilibrium System: Observations upon addition ofHCI: white precipitate In which direction did this stress cause the equilibrium system to shif? Left or Right Which ion caused the shift? Explain. 2) Acidified Chromate Solution Equilibrium System: Observations upon addition ofHNO:: solution becomes orange Left or Right In which direction did this stress cause...
3. Explain the series of color changes that can occur on thymol blue indicator by the...
3. Explain the series of color changes that can occur on thymol blue indicator by the addition of the following solutions. In each case, give the approximate pH of the solution Color change Red to Yellow Yellow to Blue pH range 12 to 2.8 Thymol blue 8.2 to 9.1 a) A few drops of thymol blue are added to 0.1 M aqueous solution of HCl(aq). b) By adding some solid sodium acetate, NaCH,O2 to a solution of (a) e) By...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) +...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided to pH change at point of Proposed indicator inflection titration between HCl and 1 to 11 NaOH 12d) Calculate the pH of the solution when 10 mL of 0.1 M NaOH is added to 25 mL 0.1 M HCI .Write appropriate chemical equations if required and show your math!!!(4 points) In the ICE table started for calculating equilibrium concentrations of the reaction shown, the...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is given below: CH3CO.H (aq) + H20 (1) = CH,CO2 (aq) + HO* (aq) Answer the following questions when the pH of the solution is adjusted to 2.8. 4. What happens to the concentration of H3O+ (aq) when pH changes from 4.8 to 2.87 b. In which direction does the equilibrium shift in the equation? c. What happens to the concentration of CH,CO2H (aq) when...
» What color did you observe after adding the 3M H2SO, solution? 4) What color did you observe after adding the IM NaOH solution? Assume that the dynamic equilibrium represented in the equation in I is present in the original solution you placed in the test tube. Based on LeChatelier's Principle, as stated above on page one, you will interpret the observations made in 2, above: (Note that H SO, produces H+ in solution.) a) When sulfuric acid was added,...
Answer questions #1-6 please
Observations and Interpretations to be Handed In For Activity: Observations and Interpretations 1) Balance the chromate / dichromate equilibrium equation: 2 Cro. (aq) + H(aq) + Cryo,'(aq) + H2O(1) (unbalanced equation) 2) What was the original color of the K,CrO solution? If the above equilibrium is established in the original solution, which species, Cro, (aq), or Cro" (aq) appears to be present in greatest amount? 3) What color did you observe after adding the 3M H2SO,...
7 8 and 9
6. Given the equilibrium pink blue When a solution of complex ion of Co* is heated, the solution becomes blue. (1 pt. each) a. Is AH for the forward reaction positive or negative? b. When the temperature is increased does the value for Kes Increase or decrease? 7. Acidified chromate solution is represented by the following equilibrium reaction (aq)+2 H(aq) Yellow 2 Cro CriO,2 (aq)+ HO (U) Orange Will this solution become yellow or orange is...
This is all the professor gave me, if there is extra information
needed please let me know in the comments!
Prelab Assignment Name 25 pts 1. Consider the following equilibrium in aqueous solution 200,- (aq) + 2H (1) --- 6,0, (g) +H_O(1) In which the Cro, ion is yellow and the Co, is orange a. the color in basie solution should be 4 pts b. the color in acidic solution should be 4 pts e. To shift the equilibrium to...
PLEASE HELP ME! ASAP PLEASE!! If you need anymore information,
please ask. This is what we were given and I am having trouble!
1) Saturated Sodium Chloride Solution Equilibrium System: Observations upon addition ofHCI: white precipitate In which direction did this stress cause the equilibrium system to shif? Left or Right Which ion caused the shift? Explain. 2) Acidified Chromate Solution Equilibrium System: Observations upon addition ofHNO:: solution becomes orange Left or Right In which direction did this stress cause...
3. Explain the series of color changes that can occur on thymol blue indicator by the addition of the following solutions. In each case, give the approximate pH of the solution Color change Red to Yellow Yellow to Blue pH range 12 to 2.8 Thymol blue 8.2 to 9.1 a) A few drops of thymol blue are added to 0.1 M aqueous solution of HCl(aq). b) By adding some solid sodium acetate, NaCH,O2 to a solution of (a) e) By...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
you. 12e) phenolphthalein (color change between pH-8-10), bromocresol green color change between pH 3-4) are provided to pH change at point of Proposed indicator inflection titration between HCl and 1 to 11 NaOH 12d) Calculate the pH of the solution when 10 mL of 0.1 M NaOH is added to 25 mL 0.1 M HCI .Write appropriate chemical equations if required and show your math!!!(4 points) In the ICE table started for calculating equilibrium concentrations of the reaction shown, the...
1. An equilibrium mixture of CH.COH and CHCO,has a pH of 4.8. The equino equation is given below: CH3CO.H (aq) + H20 (1) = CH,CO2 (aq) + HO* (aq) Answer the following questions when the pH of the solution is adjusted to 2.8. 4. What happens to the concentration of H3O+ (aq) when pH changes from 4.8 to 2.87 b. In which direction does the equilibrium shift in the equation? c. What happens to the concentration of CH,CO2H (aq) when...
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