Question

How many grams of Na₂SO₄ will be produced from 56.5 grams of NaOH according to the following equation? H₂SO₄ (aq)+ 2 NaOH (aq) ---------> Na₂SO₄ (aq) + H2O (l)

Answer 1

From stoichiometry,

2 moles of NaOH produce 1 mole of Na2SO4 i.e sodium sulphate.

or we can write

(2 x 39.997) grams of NaOH produce = 142.04 grams of Na2SO4

So, 56.5 grams of NaOH produce = (142.04 x 56.5) / (2 x 39.997 )

I.e 100.323 grams of Na2SO4

Hence correct answer is 100.323 g of Na2SO4 can be produced .