1.

Calculate the pH of 0.04 M HNO3 Solution.

Answer»

Concentration of HNO3 = 0.04M

[H3O+] = 0.04 mol dm-3 

pH = -log[H3O+]

= – log(0.04)

= – log(4 x 10-2

= 2 -log 4 = 2-0.6021 

= 1.3979= 1.40



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