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Which causes a largest change in pH on addition to 20 ml 0.1 M acetic acid solution?
(A) Addition of distilled water
(B) Addition of 20 mol of 0.01 MCH3COOH
(C) Addition of 20 ml of 0.1 M HCl
(D) Addition of 20 ml of 0.1 M NaOH
Moles of AcOH = 20 × 10−3 × 0.1 = 2 ×10−2
Moles of NaOH = 20 × 10−3 × 0.1 = 2 × 10−3
pH will change from acidic side to basic
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