The pH value of N/10 NaOH is

Question

The pH value of N/10 NaOH is (A) 7 (B) 10 (C) 12 (D) 13

Tardigrade Admin · Accepted Answer

For NaOH, N/10 NaOH = 0.1 M NaOH [NaOH]=0.1 M=10-1 M [OH-]=[NaOH]=10-1 M [H+] [OH-] = 10-14 ∴ [H+]=(10-14/[OH-])=(10-14/1×10-2)=10-13 pH=-log[H+]=-(log 10-13)=13

Q. The pH value of N/10 NaOH is

7

10

12

13

For NaOH,N/10NaOH=0.1MNaOH [NaOH]=0.1M=10−1M [OH−]=[NaOH]=10−1M [H+][OH−]=10−14 ∴[H+]=[OH−]10−14​=1×10−210−14​=10−13 pH=−log[H+]=−(log10−13)=13