The pH of a 0.001 M aqueous solution of sodium hydroxide will be:
A
5
No worries! Weāve got your back. Try BYJUāS free classes today!
B
7.5
No worries! Weāve got your back. Try BYJUāS free classes today!
C
9
No worries! Weāve got your back. Try BYJUāS free classes today!
D
11
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D 11 NaOH is a strong electrolyte. It completely dissociates. Thus [OH−]=[NaOH]=0.001 M. pOH=−log[OH+]=−log10−3=3.0. pH=14.0−pOH=14.0−3.0=11.0.