Question

How many grams of NaOH are present in 250 cm3
of 0.5 (M) NaOH solution ?
(A) 10 gm
(C) 5 gm
(D)4 gm
(B)20 gm
​

Answer 1

Answer:

Molarity= No. ofMoles of solute/Volume of the solution in litres.

So,given info- 0.5(M)=Molarity and volume given as 250cm^3

BTP:- 0.5 =Moles/250×1000

Moles=0.5×25000

=12500

Mass of NaOH= 12500×Molecular mass

=12500×40

=5×10^5

=5 gm that is Option c.

HOPE THIS HELPS..