pH of `10^(-6) M HI(aq.)` is :-

Options

A. just less than 6
B. exactly equal to 6
C. just greater than 6
D. just less than 7

Answer

A

Explanation

total `[H^(+)]=10^(-6)+10^(-7) `
=`10^(-7)[10+1]`
` pH=-log(11xx10^(-7))`
pH=5.98