Home
Class 12
CHEMISTRY
The number of hydroxyl ions in 10 cm^(3...

The number of hydroxyl ions in ` 10 cm^(3)` of 0.2 M HCl solution is

A

`5 xx 10^(-14)`

B

`3 xx 10^(9)`

C

`3 xx10^(12)`

D

`5 xx 10^(-12)`

Text Solution

Verified by Experts

The correct Answer is:
C
`[H^(+)]=0.2M ` ( given , HCl=0.2M)
`[H^(+)][OH^(-)]=10^(-14)`
`[OH^(-)]=(10^(-14))/(0.2)=5xx10^(14)M`
Concenetration of hydroxyl ions in 0.2 M HCl `=5xx10^(-14)M`
`:.` The number of moles of hydroxyl ions `= 5 xx 10^(-14)xx1000`
The number of `OH^(-)` in 10 `cm^(3)`
`=( 5 xx 10^(14) xx 1000 xx 6.023xx10^(23))/(10)`
`= 3 xx 10^(12)`
Promotional Banner

Topper's Solved these Questions

  • MHTCET 2008

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise CHEMISTRY|50 Videos

  • MHTCET 2010

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Chemistry|50 Videos

Similar Questions

Explore conceptually related problems

The number of hydroxyl ions in 100 mL of a solution having pH 10 is

The number of Cl^(-) ions in 100 mL of 0.001 M HCl solution is

Calculate the number of Cl^(-) ions in 100 ml of 0.001 M HCl solution.

The pH of 0.02 M solution of HCl is

The number of AI^(3+) ions in 100 mL of 0.15 M solution of AI_2(SO_4)_3 are:

Calculate the concentration of hydroxyl ions in 0.2 M solution of ammonium hydroxide having K_(b) =1.8 xx 10^(-5) .