Determine the mass of silver that will be obtained if 50 g of ethanal are added to the ammonia solution of silver oxide.

Let’s find the amount of ethanal substance СН3СОН.

M (CH3CHOH) = 44 g / mol.

n = m: M.

n (CH3COH) = 50 g: 44 g / mol = 1.136 mol.

Let’s compose the reaction equation, find the quantitative ratios of substances.

CH3COOH + Ag2O = CH3COOH + 2Ag ↓.

According to the reaction equation, there is 2 mol of Ag per 1 mol of СН3СОН. The substances are in quantitative ratios of 1: 2.

n (Ag) = 2n (СН3СОН) = 1.136 × 2 = 2.27 mol.

Let’s find the mass Ag.

M (Ag) = 108 g / mol.

m = n × M,

m = 2.27 mol × 108 g / mol = 245.16 g.

Answer: 245.16 g.