Answer to Question #162467 in General Chemistry for Maddy Brown

Question

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.25 g of sodium carbonate is mixed with one containing 6.50 g of silver nitrate. After the reaction is complete, the solutions are evaporated to dryness, leaving a mixture of salts. How many grams of each of the following compounds are present after the reaction is complete?

sodium carbonate

silver nitrate

silver carbonate

sodium nitrate

Answer 1

Na₂CO₃ + 2 AgNO₃ $\to$ AgCO₃ $\downarrow$ + 2NaNO₃

n(Na₂CO₃) = 3.25g/106g/mol = 0.0307mol

n(AgNO₃) = 6.50g/170g/mol = 0.0382mol

1mol Na₂CO₃ $\to$ 2mol AgNO₃

xmol Na₂CO₃ $\to$ 0.0382 mol AgNO₃

x = 0.0191

n(Na₂CO₃) = 0.0307 - 0.0191 = 0.0116mol

m(Na₂CO₃) = 0.0116mol × 106 g/mol = 1.2296g

n(NaNO₃) = 0.0382mol

m(NaNO₃) = 0.0382mol × 85g/mol = 3.247 g

n(Ag₂CO₃) = 0.0191 mol

m(Ag₂CO₃) = 0.0191mol × 276 g/mol = 5.2716g

Sodium carbonate = 1.2296g

Silver nitrate = 0g

Silver carbonate = 5.2716g

Sodium nitrate = 3.247g