Question
Asked Oct 17, 2019
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A buffer solution contains 0.496 M KHSO3 and 0.314 M Na2SO3. Determine the pH change when 0.126 mol NaOH is added to 1.00 L of the buffer.

pH after addition − pH before addition = pH change = ____

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Expert Answer

Step 1

A buffer solution refers to an aqueous solution that consists of a mixture containing a weak acid and its conjugate base. These solutions are used as a means by which the pH can be kept constant in a wide range of chemical reactions.

Step 2

The pH  can be defined as  the measure of the molar concentration of all the H+ which are present in the given aqueous solution. It  is also a measure of acidity or basicity of the given solution. 

Step 3

The given buffer is an acidic buffer.

As per ...

[salt]
pH-pK+lg
[acid]
The pK for KHSO, is 7.172
[Na SO
pHpKlog
[KHSO
(0.314)
'(0.496)
pH 7.172+log
-6.9734
help_outline

Image Transcriptionclose

[salt] pH-pK+lg [acid] The pK for KHSO, is 7.172 [Na SO pHpKlog [KHSO (0.314) '(0.496) pH 7.172+log -6.9734

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