10-6 M HCl is diluted to 100 times. Its pH is

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6.0

8.0

6.95

9.5

answer is C.

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Detailed Solution

On dilution an acid solution never becomes neutral or basic. When on dilution H+ becomes lesser than 10-7, H+ from water is also added.After dilution H+=10-6100=10-8H+Total = H+Acid +H+Water = 10-8+10-7 = 10-71+0.1=1.1×10-7 pH = -log1.1×10-7=7-log1.1 =7-0.04=6.95

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