wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

Consider a strong base, Ca(OH)2 in a solution having concentration of 0.5×105 M. The pH of the given solution of Ca(OH)2 is :

A
11
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
10
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
9
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
8
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 9
Given, [Ca(OH)2]initial=0.5×105 M=C
Since it is a strong base, it ionizes completely.
Then ,

Ca(OH)2(aq)Ca2+(aq.)+2OH(aq.)Initial: C 0 0Equilibrium: 0 C 2C

[OH] =2C=2×0.5×105 M=105 M

pOH=log[OH]pOH=log(105)=5pH+pOH=14pH=14pOH=145pH=9

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon