Question

20 ml of a solution contains 0.4 gm of caustic soda.The molarity of the solution is

Answer 1

the molarity =no.of moles of solute /volume of solution to find no of solute we have to divide weight by molar mass we get the no of solute =0.01than divide it by the volume of solution in litre we multiply the whole eq with 1000 if it is in ml we get molarity answer =0.5mol.