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determine the ph of the following solutions, showing calculations:

1) a mixture of 0.040 M CH3COOH and 0.060 M CH3COO-

2) 10.00 ml of solution, 0.040 M CH3COOH, Ka= 1.8 * 10-5, titrated to the endpoint with 0.060 M NaOH

3) solution 2) after 5.00ml more of the 0.060 M NaOH has been added

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