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i. What is the pH of a mixture of 0.042MNaH2PO4 and 0.058MNa2HPO4,pka=7.21 ii. If 1.0ml of 10.0MNaOH is added to 1 litre of the buffer

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i. What is the pH of a mixture of 0.042MNaH2PO4 and 0.058MNa2HPO4,pka=7.21 ii. If 1.0ml of 10.0MNaOH is added to 1 litre of the buffer prepared in (i), how much will the pH change? iii. If 1.0ml of 10.0MNaOH is added to 1 litre of pure water at pH7.0, what is the final answer? Compare this with answer in (ii)

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