Question

els response Question 4 of 5 estion 4 20 points Save Answer Metal carbonates decompose to form metal oxides and carbon dioxide. An experiment was done to determine the composition of a mixture of sodium chloride and sodium carbonate. A sample of the mixture with a mass of 5.05 grams was heated until gas production stopped. After the reaction, the sample had a mass of 4. 17 grams. Assuming that sodium chloride does not react and that the decrease in mass was due to the creation of CO2 Ras, what was the mass of Narco in the sample? Report your answer with three significant figures. Na2CO3-Na2O + CO2

Answer 1

let Na co₂ = x gm Nace = 5.05-x gm mass of co formed = 5005 - 4.17 = 0.88 gm mole of co, = 0.88 - 0.02 mole mole of Na, CO₂=0.02 mass of Na co z=0.02x106=2012 gm 2 NaOH → Na, O +HO mole of NaOH = 6.56 0.164 mole 40 mole of water formed = 0.164 =0.082 - 2 mole mass of water vap formed = .08 2x18 = 10476 gm loss of mass - 6.57-1.476 5.084 gm