Question

2) The pH of 1x10-1M (HNO3) solution is:

A)1
B) 1.3
C)5
D)2

Answer 1

Concentration of H+ ions in HNO3 solution is 10⁻¹ which is equal to 0.1 M

`\bf \: pH \: = - log[{h}^( + )]`

putting the value we get

`\sf \dashrightarrow \: pH \: = - log \: [ (1)/(10)] \\ \\ \sf \dashrightarrow \: pH \: = - log \: {10}^( - 1) \\ \\ \sf \dashrightarrow \: pH \: = 1`

So, the required option is A) 1