Question

Calculate the molarity naoh in the solution prepared by dissolving its 4 gm enough water to from 250 ml of the solution.

Answer 1

$molarity \: = no. \: of \: moles \: of \: the \: solute \: \div \:volume \: of \: the \: solution \: in \: litres$
No. of moles of NaOH = given weight ÷ G.A.M
= 4÷23 moles
there molarity = (4÷23)÷(250÷1000)
= (4÷23)*(1000÷250)
=0.695 M