Question

Calculate the amount of NaOH required to make 250 ml of 1 molar solution

Answer 1

apply the molar mass formula m=m/n

Answer 2

Answer:

10g of NaOH is required to make 250 ml of 1 molar solution.

Explanation:

Given that,

    molar concentration of solution = 1M

                          volume of solution = 250mL = 0.25L

                       molar mass of NaOH = 40g/mol.

molar concentration =  moles of solute / liters of solution

 so, moles of solute = 1M × 0.25L = 0.25mol.

0.25 moles of NaOH is needed to make 250mL of 1M solution.

weight of NaOH = number of moles × molar mass of NaOH

⇒                         = 0.25mol. × 40g/mol. = 10g

Hence, the required answer is 10g.