Calculate the amount of sediment substance that forms when the barium chloride solution

Calculate the amount of sediment substance that forms when the barium chloride solution is merged with a solution containing 7.1 g of sodium sulfate.

Given:

m (Na2SO4) = 7.1 grams;

To find:

m (draft) -?

Solution:

Na2SO4 + BaCl2 = 2NaCl + BaSO4, – we solve the problem, relying on the composed reaction equation:

1) Find the amount of sodium sulfate contained in 7.1 grams:

n (Na2SO4) = m: M = 7.1 g: 142 g / mol = 0.05 mol;

2) We compose a logical equation:

if 1 mole of barium sulfate requires 1 mole of sodium sulfate,

then 0.05 mol of barium sulfate will require x mol of sodium sulfate,

then x = mol.

n (BaSO4) = 0.05 mol.

Answer: n (BaSO4) = 0.05 mol.