Question

0,081.10-8 mol/l. calcule o seu ph

Answer 1

Ph=-log[H+]
Ph=-log[0,081.10^-8]. 0,081≈0,100
Ph=-log[0,100.10^-8]
Ph=-log[10^-1.10^-8]
Ph=-log[10^-9]
Ph=-(-9)log10
Ph=9.1
Ph≈9