pHof 10 ml of weak monoprotic acid is 4. To increase pH of this solution by one unit the volume of water that must be added is
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answer is 2.
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Detailed Solution
For a weak acid; pH=12pKa-12log C; For a weak acid; pH after dilution = pH before dilution +12logVfinalVinitial 5=4+12logVfinalVinitial Vfinal=1000ml VH2O=1000Vfinal-10Vinitial=990 ml