Question

Que no.20. How much water should added to 200 cc of seminormal solution of NaOH to make it exactly decinormal
(1) 1000 cc
(2) 400 cc
(3) 800 cc
(4) 600 cc

Answer 1

Dear Student,

Normality (N1) = 0.5 (seminormal)

Volume(V1) = 200 cc

Normality (N2) = 0.1 (decinormal)

​Volume (V2) = ?

(N1)​(V1) = ​(N2) ​(V2)

0.5 X 200 = 0.1 X ​(V2)

(V2) = 1000 ml

Volume of water added = 1000 -200 = 800 ml or cc (option 3)

Regards​