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A buffer solution was made by adding 15.0 g of CH_(3) COOH and 20.5gCH_(3)COONa . The buffer is diluted to 1.0L . Calculate the pH of solution. Given: pK_(a) of CH_(3)COOH = 4.74, log ((13)/(12)) = 0.035

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Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2. Which solution is a strong acid?