Question

For the following reaction, 3.46 grams of hydrochloric acid are mixed with excess oxygen gas. The reaction yields 0.728 grams of water. hydrochloric acid (aq) + oxygen (g) water (l) + chlorine (g) What is the theoretical yield of water ? What is the percent yield of water ?

Answer 1

4 HCl +   O2 -------------------> 2 H2O + 2 Cl2

142 g                                        36 g

142 g HCl -------------------> 36 g H2O

3.46 g HCl ------------------> x g H2O

x = 3.46 x 36 / 142

x = 0.877 g

theoretical yield of water = 0.877 g

percent yield of water   = (0.728 / 0.877) x 100

                                   = 83.0 %