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A buffer is made by preparing a 750mL solution with 0.150 mol/L HNO2 and 0.125mol/L NaNO2. The Ka of HNO2 is 4.5 x 10^-4. What is the pH of the buffer?

A buffer is made by preparing a 750mL solution with 0.150 mol/L HNO2 and 0.125mol/L NaNO2. The Ka of HNO2 is 4.5 x 10^-4. What is the pH of the buffer?
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A buffer is made by preparing a 750mL solution with 0.150 mol/L HNO2 and 0.125mol/L NaNO2. The Ka of HNO2 is 4.5 x 10^-4. What is the pH of the buffer?

User Kmader
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1 Answer

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The pH of the buffer is 3.27 (3s.f.) and the workings are as shown in the attached picture below.
A buffer is made by preparing a 750mL solution with 0.150 mol/L HNO2 and 0.125mol-example-1
User Oleg Imanilov
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8.9k points
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