Question

What mass of sodium hydroxide is required in 150 g of water to make 40% concentration of solution?

Answer 1

Answer:

The molar mass of NaOH is 40 g/mol.

The number of moles of NaOH is equal to the ratio of its mass to molar mass.

The number of moles of NaOH =40g/mol40g=1mol

The molarity of NaOH solution is the ratio of number of moles of NaOH to total volume of solution in L.

M=1L1mol=1M