Question

4 grams of naoh is dissolved in 250cm3 of water calculate molarity

Answer 1

Explanation:

volume of water=250ml=0.250L

mass of naoh =4g

molar mass of naoh=23+16+1=40g

number of mole=4÷40=0.1mol

molarity=number of mole of naoh÷volume of water=0.1÷0.250=0.4molL-1