Question

Sodium reacts with oxygen according to the reaction below. (25 points) a) How many grams of sodium oxide (Na,o) are produced from 3.55 g of Na? b) Calculate the actual yield (in grams) of Na, O if the reaction yield was 92.5%. 4Na + O2 + 2Na,o

Answer 1

Given eqation 4Na + O2 2Na20 2Na + 1/2 02 Nazo a) 2 moles of Na produce one mole of Na O mole = wt/mwt 2 moles of Na = wt/22.9897 wt of Na = 45.9794 45.9794 g of Na produce 61.9789 g of Na20 3.55 g of Na produce 4.7852 g of Na, b) 3.55 g of Na — 4.7852 g Na,0 (100% yield) 4.4263 g Na,o (92.5% yild) for 92.5% yield 4.4263 g of Na2O will obtain