Homework Answers
Addition of any of the reactant shifts the equilibrium to the side where it can consume the added substance i.e.- towards product side.
Addition of HCl would eventually increase the H3O+ ion and hence, the equilibrium shifts to right hand side i.e. in forward direction
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The reaction to produce dichromate ion (orange) from chromate ion (yellow) is represented by the following...
pes) Explain Le Chatelier's Principle The reaction to produce dichromate ion (orange) from chromate ion (yellow)...
pes) Explain Le Chatelier's Principle The reaction to produce dichromate ion (orange) from chromate ion (yellow) is represented by the following equation: 2C704 + 2H.Org Cr2O ) + 3H2O Where would the equilibrium shift and what would you observe if you add HCl(aq) to the test tube? (2pts.) 6. Indicate for each of the following substances whether they are acidic, basic or neutral in aqueous solution. (4pts.) a. Vinegar b. Baking Soda c. Lemon Juice d. Ammonia 7. What is...
Another interesting equilibrium system is that between the polyatomic ions chromate, CrO42-, and dichromate, Cr2O72-. In...
Another interesting equilibrium system is that between the polyatomic ions chromate, CrO42-, and dichromate, Cr2O72-. In an acidic environment (high H3O+), the chromate will react to form dichromate ion. Barium will react with chromate, but NOT dichromate, to form an insoluble precipitate. 2 CrO42- (aq, yellow) + 2 H3O+ (aq) <---> Cr2O72- (aq, orange) + 2 H2O (l) Describe and explain how the chemical equilibrium will shift and what changes you would observe under the following scenarios: a) Addition of...
Another interesting equilibrium system is that between the polyatomic ions chromate, CrO42-, and dichromate, Cr2O72-. In...
Another interesting equilibrium system is that between the polyatomic ions chromate, CrO42-, and dichromate, Cr2O72-. In an acidic environment (high H3O+), the chromate will react to form dichromate ion. Barium will react with chromate, but NOT dichromate, to form an insoluble precipitate. 2 CrO42- (aq, yellow) + 2 H3O+ (aq) <---> Cr2O72- (aq, orange) + 2 H2O (l) Describe and explain how the chemical equilibrium will shift and what changes you would observe under the following scenarios: a) Addition of...
The yellow chromate ion and the orange dichromate ion both contain a Cr(VI) center. These two...
The yellow chromate ion and the orange dichromate ion both contain a Cr(VI) center. These two species are linked by the reaction below. Which species is an acid? At what pH will the two species be at equal concentration in an aqueous solution? 8. A solution was made by adding of 2.81 g of ethyl amine (CH3CH2NH2)to water making 500.0 mL of solution. After the solution had come to equilibrium, the concentration of ethyl amine was found to be 0.118...
I need help with these questions, I just dont get it Consider the equilibrium between chromate...
I need help with these questions, I just dont get it Consider the equilibrium between chromate (CrO42-) and dichromate (Cr2O72-) in aqueous acid. 2CrO4^2-(aq) + 2H^+(aq) ⇌ Cr2O7^2-(aq) + H2O(l) Answer the following questions about the above equilibrium. 1.To an orange colored equilibrium mixture, concentrated sulfuric acid is added. What do you expect to observe for the color of the reaction mixture? Explain your answer and give reasons. 2. To an orange colored equilibrium mixture, a few drops of ammonia...
Please explain in words and in equation. (5 pts) Chromium (VI) forms two different oxyanions, the orange dichromate...
Please explain in words and in equation.
(5 pts) Chromium (VI) forms two different oxyanions, the orange dichromate ion, Cr207, and the yellow chromate ion, CrO42- The equilibrium reaction between the two ions is Cr2O72- +H20 (1) orange 2 CrO42- + 2 H+ (aq) yellow At equilibrium the solution starts out looking amber a color between orange and yellow. Explain what would happen to the solution of sodium hydroxide is added. 2-
Chromate is acidified to dichromate as shown in the following chemical reaction. 2 Cro4^2- + 2...
Chromate is acidified to dichromate as shown in the following chemical reaction. 2 Cro4^2- + 2 H^+ -> <- Cr2O7 ^-2 + H2O Would you add HCL or NaOH to shift the reaction to the right? Which of the following would you add to shift the reaction in reverse: K2CrP4, HCL or NaOH? Explain your choice.
2. Chromate-Dichromate Equilibrium eilas a. KaCrO4 color b. K2Cr04+ H2SO4 color an Orange c. Mixture (b)...
2. Chromate-Dichromate Equilibrium eilas a. KaCrO4 color b. K2Cr04+ H2SO4 color an Orange c. Mixture (b) + NaOH color Yeliaw ( w/ pauptete) d. Mixture (c) + H2SO4 color Oanae e. Mixture (d)+H2O color ght Ovange Write the net ionic equilibrium equation for this reaction: 2 H20 ) Explain color changes. (Use equations when necessary.)
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...
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...
pes) Explain Le Chatelier's Principle The reaction to produce dichromate ion (orange) from chromate ion (yellow) is represented by the following equation: 2C704 + 2H.Org Cr2O ) + 3H2O Where would the equilibrium shift and what would you observe if you add HCl(aq) to the test tube? (2pts.) 6. Indicate for each of the following substances whether they are acidic, basic or neutral in aqueous solution. (4pts.) a. Vinegar b. Baking Soda c. Lemon Juice d. Ammonia 7. What is...
Please explain in words and in equation.
(5 pts) Chromium (VI) forms two different oxyanions, the orange dichromate ion, Cr207, and the yellow chromate ion, CrO42- The equilibrium reaction between the two ions is Cr2O72- +H20 (1) orange 2 CrO42- + 2 H+ (aq) yellow At equilibrium the solution starts out looking amber a color between orange and yellow. Explain what would happen to the solution of sodium hydroxide is added. 2-
2. Chromate-Dichromate Equilibrium eilas a. KaCrO4 color b. K2Cr04+ H2SO4 color an Orange c. Mixture (b) + NaOH color Yeliaw ( w/ pauptete) d. Mixture (c) + H2SO4 color Oanae e. Mixture (d)+H2O color ght Ovange Write the net ionic equilibrium equation for this reaction: 2 H20 ) Explain color changes. (Use equations when necessary.)
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...
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...
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