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Find the pH of a solution prepared by mixing 25ml of a 0.5M solution of HCI,10ml of a 0.5M solution of NaOH and 15 ml of water :-A. 4B. 3C. 0. 82D. 0. 10

Answer» Correct Answer - C
meq of HCI`=0.5xx25=12.5`
meq of `NaOH=0.5xx10=5`
remaning of HCI in mixture =7.5
Total volume `=25+10+15=50 mL`
`[H^(+)]=(7.5)/(50)`
pH = log `(7.5)/(50)=0.82`


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