Consider a 1.00 L buffer made by adding 0.140 mol cyanic acid HCNO, and 0.110 mol potassium cyanate ,KCNO, to sufficient water. Calculate the pH of a buffer (a) Before any acid or base is added; (b) after the addition of 0.015 mol of HNO3; (c) After the addition of 0.015 mol of KOH. In parts (b) and ( c) assume the volume does not change. pka(HCNO)=3.48; ka(HCNO)= 3.3 x 10-4,

Consider a 1.00 L buffer made by adding 0.140 mol cyanic acid HCNO, and 0.110 mol potassium cyanate ,KCNO, to sufficient water. Calculate the pH of a buffer (a) Before any acid or base is added; (b) after the addition of 0.015 mol of HNO3; (c) After the addition of 0.015 mol of KOH. In parts (b) and ( c) assume the volume does not change. pka(HCNO)=3.48; ka(HCNO)= 3.3 x 10-4,

Chemistry

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ISBN:9781305957404

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Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Acid Base Titration

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Q:3-3
Consider a 1.00 L buffer made by adding 0.140 mol cyanic acid
HCNO, and 0.110 mol potassium cyanate ,KCNO, to sufficient
water. Calculate the pH
a buffer
(a) Before any acid or base is added;
(b) after the addition of 0.015 mol of HNO3;
(c) After the addition of 0.015 mol of KOH.
In parts (b) and (c) assume the volume does not change .
pka(HCNO)=3.48; ka(HCNO)= 3.3 X 104.

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