Some Basic Concepts Of Chemistry Question 11
Question: To neutralize completely 20 mL of 0.l M aqueous solution of phosphorus ( $ H _3PO _3 $ ) acid the volume of 0.1 M aqueous KOH solution required is
Options:
A) 60 mL
B) 20 mL
C) 40 mL
D) 10 mL
Show Answer
Answer:
Correct Answer: C
Solution:
Meq. of $ H _3PO _3 $ = Meq. of KOH $ M _1V _1\times $ Basicity = $ M _2V _2\times $ Acidity $ 20\times 0.1\times 2=V\times 0.1\times 1 $
$ \therefore $ V=40 mL
