Question

A sample of pure common salt of mass 56.5g contains 23gm of sodium. Find the mass ratio of sodium to chlorine in a100gm pure sodium chloride sample.

Answer 1

Mass of salt =56g.

Mass of Na in salt = 23g

Mass % of Na in the sample = (mass of Na/mass of salt sample) x 100 = (23/56) 100 =41.%

Mass of Na in 100 g sample = 41 % of 100g = 41 g

Mass of Cl in 100 g of sample = 100g - mass of Na = 100g-41 g = 59 g

Ratio by mass = mass of Na/ mass of Cl = 41/59