Question

when the reading of pH meter in a solution is 6. It indicates that concentration of hydrogen ions is

• A. ${10}^{-6}$ g/litre and the solution is acidic
• B. ${10}^{-6}$ g/litre and the solution is alkalite
• C. ${10}^{-6}$ mg/litre and the solution is acidic
• D. ${10}^{-6}$ mg/litre and the solution is alkalite

Answer 1

The correct option is A ${10}^{-6}$ g/litre and the solution is acidic

$\because$ $pH=-log\left[H^{+}\right]$

$6=-log\left[H^{+}\right]$

$\therefore$ $\left[H^{+}\right]={10}^{-6}g/litre$

Since, pH < 7 therefore solution is acidic.