You use 4.98 g of Na2SO4, how many grams of barium sulfate are produced?

Question

Na2SO4+Ba(NO3)2–> ?

partial answer: 8.XX g NaSO4

Answer 1

Look at the balanced equation:

Na₂SO₄(aq) + Ba(NO₃)₂(aq) ==> BaSO₄(s) + 2NaNO₃(aq) --- double replacement

Convert g Na₂SO₄ to moles of Na₂SO₄.

Determine moles BaSO₄ made from that many moles of Na₂SO₄

Convert moles BaSO₄ to grams of BaSO₄.

4.98 g Na₂SO₄ x 1 mole/142 g = 0.03507 moles

moles BaSO₄ made = 0.03057 mol Na₂SO₄ x 1 mol BaSO₄/1mol Na₂SO₄ = 0.03507 mol BaSO₄

grams BaSO₄ = 0.03507 mol BaSO₄ x 233 g/mol = 8.17 g BaSO₄ (to 3 significant figures)

Answer 2

You probably meant 8.XX g BaSO₄, not NaSO₄.