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Calculate the pH of 0.04 M HNO3 Solution.

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Calculate the pH of 0.04 M HNO3 Solution.

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Concentration of HNO3 = 0.04M

[H3O+] = 0.04 mol dm-3 

pH = – 1og[H3O+] 

= – log (0.04)

= – log(4 x 10-2) 

= 2 – log4 = 2 – 0.6021 

= 1.3979 = 1.40

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