1.

Determine the pOH of a solution after 0.1 mole of NaOH is added to 1 litre of solution containing 0.15 M CH_(3)COOH and 0.2 M CH_(3)COONa. Assume no change in volume. [Given: log 3 = 0.48, log 2 = 0.30, pK_(a) "of acetic acid" = 4.74]

Answer»

8.48
5.52
9.66
None

Solution :`CH_(3)COOH + OH^(-) to CH_(3)COO^(-)+H_(2)O`
`{:(0.15,0.1,0.2),(0.05,0,0.3):}`
`pH = 4.74 + log (0.3)/(0.05)`.


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