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CO, + H,0 = H,CO, = H* + HCO, = 2H* + CO, carbonic acid bicarbonate carbonate Shown above are the chemical equilibria of the carbonate buffer system. What happens to this equilibrium when an HCI is added to it? O The pH changes quickly as the equilibrium shifts to the right. O The pH changes quickly as the equilibrium shifts to the left. O The pH changes slowly as the equilibrium shifts to the right. O The pH changes slowly as the equilibrium shifts to the left.

CO, + H,0 = H,CO, = H* + HCO, = 2H* + CO, carbonic acid bicarbonate carbonate Shown above are the chemical equilibria of the carbonate buffer system. What happens to this equilibrium when an HCI is added to it? O The pH changes quickly as the equilibrium shifts to the right. O The pH changes quickly as the equilibrium shifts to the left. O The pH changes slowly as the equilibrium shifts to the right. O The pH changes slowly as the equilibrium shifts to the left.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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HR HR H R HR HR O To the left end O To the right end QUESTION 2 CO, + H,0 = H,CO, = H* + HCO, = 2H*+ CO,2- carbonic acid bicarbonate carbonate Shown above are the chemical equilibria of the carbonate buffer system. What happens to this equilibrium when an HCl is added to it? O The pH changes quickly as the equilibrium shifts to the right. O The pH changes quickly as the equilibrium shifts to the left. O The pH changes slowly as the equilibrium shifts to the right. O The pH changes slowly as the equilibrium shifts to the left. QUESTION 3 Imagine the weak acid HA is at equilibrium (shown below). What would you add if you wanted to increase the concentration of A ? HA <=> H* + A" O H+ O HA pe here to search 1O
Transcribed Image Text:HR HR H R HR HR O To the left end O To the right end QUESTION 2 CO, + H,0 = H,CO, = H* + HCO, = 2H*+ CO,2- carbonic acid bicarbonate carbonate Shown above are the chemical equilibria of the carbonate buffer system. What happens to this equilibrium when an HCl is added to it? O The pH changes quickly as the equilibrium shifts to the right. O The pH changes quickly as the equilibrium shifts to the left. O The pH changes slowly as the equilibrium shifts to the right. O The pH changes slowly as the equilibrium shifts to the left. QUESTION 3 Imagine the weak acid HA is at equilibrium (shown below). What would you add if you wanted to increase the concentration of A ? HA <=> H* + A" O H+ O HA pe here to search 1O
Expert Solution
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Answer to Question 2:

On addition of HCl, CO32- and HCO3-  takes up proton to form HCO3- and H2CO3 respectively. 

Therefore, on addition of HCl the equilibrium shifts to the left.

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