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Chemical Engineering Basics - Engineering

Q1:

The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6 )

A 4.4

B 5.6

C 8.4

D 2.4

ANS:A - 4.4

pH = -Log conc[H+] = - log[4*10^-5] = -[log4+log10^-5] = 0.6+(-5log10) = -(0.6-5)=4.4.