1.

In an experiment, 0.04 F was passed through 400 mL of a 1M solution of NaCl. What would be the pH of the solution after the electrolysis ?

Answer»

8
10
13
6

Solution :Electolysis of aq. NaCl gives hydrogen gas at cathode and oxygen gas at anode, the electrolyte solution contains NaOH after electrolysis.
NUMBER of equivalents of NaOH formed = 0.04
NORMALITY, `N = (0.04 XX 1000)/(400) = 0.1`
`[HO^(-)] = 0.1 M`
`pOH = "" :. pH = 13`


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