1.

Calculate the pH of a solution containing 2.0 gofNaOH per litre of the solution

Answer»

concentration of NaOH = (2/40)mol/L = 0.05M

so, concentration of OH- = 5×10-²

now, pOH = -log10[5×10-²] = -[log10[5] -2] =2-log5 = 2-0.7 = 1.3

so pH = 14-pOH = 14-1.3 = 12.7



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