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FrontierScience / ee749fc0-8faa-45f7-881b-b5703b1a4b01 / Carbonic acid (…HCO₃^(−)`) or carbonate ions (`CO₃^(2−)`) when a small amount is added to a hydrogencarbonate (…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

Carbonic acid (\\(H_2CO_3\\)) has \\(pK\_{a1}=6.35\\) and \\(pK\_{a2}=10.33\\). 10.0% of the carbonic acid (\\(H_2CO_3\\)) dissociated into either hydrogencarbonate ions (`

HCO_3^-

`) or carbonate ions (`

CO_3^{2-}

`) when a small amount is added to a hydrogencarbonate (\\(HCO_3^-\\)) buffer solution. What is the pH of the buffer solution? Report the answer to one decimal place. Think step by step and solve the problem below. At the end of your response, write your final answer on a new line starting with “FINAL ANSWER”. It should be an answer to the question such as providing a number, mathematical expression, formula, or entity name, without any extra commentary or providing multiple answer attempts.

Plain-text mathematical notation (without MathML)

Carbonic acid (\\(H_2CO_3\\)) has \\(pK\_{a1}=6.35\\) and \\(pK\_{a2}=10.33\\). 10.0% of the carbonic acid (\\(H_2CO_3\\)) dissociated into either hydrogencarbonate ions (`HCO₃^(−)`) or carbonate ions (`CO₃^(2−)`) when a small amount is added to a hydrogencarbonate (\\(HCO_3^-\\)) buffer solution. What is the pH of the buffer solution? Report the answer to one decimal place.

Think step by step and solve the problem below. At the end of your response, write your final answer on a new line starting with “FINAL ANSWER”. It should be an answer to the question such as providing a number, mathematical expression, formula, or entity name, without any extra commentary or providing multiple answer attempts.

Original LaTeX notation

Carbonic acid (\\(H_2CO_3\\)) has \\(pK\_{a1}=6.35\\) and \\(pK\_{a2}=10.33\\). 10.0% of the carbonic acid (\\(H_2CO_3\\)) dissociated into either hydrogencarbonate ions (`\( HCO_3^- \)`) or carbonate ions (`\( CO_3^{2-} \)`) when a small amount is added to a hydrogencarbonate (\\(HCO_3^-\\)) buffer solution. What is the pH of the buffer solution? Report the answer to one decimal place.

Think step by step and solve the problem below. At the end of your response, write your final answer on a new line starting with “FINAL ANSWER”. It should be an answer to the question such as providing a number, mathematical expression, formula, or entity name, without any extra commentary or providing multiple answer attempts.

subject

chemistry

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Source and history

upstream_id / Original problem ID: ee749fc0-8faa-45f7-881b-b5703b1a4b01
task_id: a328c1de-5243-5a8b-86ee-dac6cf8bbd3e
task_key: olympiad--test--ee749fc0~2d8faa~2d45f7~2d881b~2db5703b1a4b01
task_revision_id: 1
config / split: olympiad / test

Official source

initial import