1.

Components of buffer solution are 0.1 M HCN and 0.2 M NaCN. What is the pH of the solution

Answer»

9.61
6.15
2
4.2

Solution :`PH = pK_(a) + LOG[("SALT")/("ACID")]`
`= 9.30 + log[(0.2)/(0.1)] = 9.30 + 0.3010 = 9.6`.


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