Determine the pH of the following solution:
0.954 M NaCl
Answer : pH of 0.954 M NaCl solution = 7
Since NaCl is a salt formed by strong acid ( HCl) and strong base (NaOH) .
NaCl + H2O ----> Na+ (aq) + Cl- (aq)
No further Hydrolysis of any ion formed .
So, pH will be only due to dissociation of water .
H2O ----> H+ (aq) + OH- (aq)
From the dissociation of water , Kw = 10-14 = [H+ ] [OH- ]
So, [H+ ] = 10-7 = [OH- ]
pH = -log(H+ ) = -log(10-7) = 7
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