Question

Aqueous hydrochloric acid and aqueous potassium permanganate react to form chlorine gas, liquid water, solid potassium chloride, and aqueous manganese chloride. If 8.88×104 milligrams of hydrochloric acid reacts with an excess of potassium permanganate, determine the mass of chlorine in grams. I really have no Idea how to approach this problem. Please help this is due at midnight tonight.

A. 1.01×106 grams

B. 7.79×103 grams

C. 2.59×108 grams

D. 5.53×105 grams

E.54.0 grams

Answer 1

answer : E) .54.0 grams

the balanced reaction is :

mass of HCl = 8.88 x 10^4 mg

                    = 88.8 g

2KMnO4 (aq) + 16HCl (aq) -------------> 2KCl (s) + 2MnCl2 (aq) + 8H2O (l) + 5Cl2 (g)

                          584 g                                                                                      355 g

                          88.8 g                                                                                         ??

according to balanced equation :

584 g HCl   ---------------> 355 g Cl2

88.8 g HCl -------------->   ?? g Cl2

mass of Cl2 gas = 88.8 x 355 / 584

                           = 54.0 grams

mass of chlorine gas = 54.0 grams