NEED HELP ASAP PLEASE

Question

Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes upon contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams upon contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the reaction of an acid on an alkaline earth metal peroxide, such as barium peroxide.

What amount of hydrogen peroxide should result when 1.12 g of barium peroxide is treated with 32.9 mL of hydrochloric acid solution containing 0.0291 g of HCl per mL?

g H2O2

Answer 1

The first step will be to write out the chemical equation of the reaction and then balancing it. Next step would be to find the limiting reactant - in this case, it would be BaO2 (barium peroxide). After calculating, you would find that the amount of hydrogen peroxide produced is 0.224 g.

BaO2 + 2HCl -> BaCl2 + H2O2

1.12 g BaO2 x 1 mol BaO2/169.33 g BaO2 x 1 mol H2O2/1 mol BaO2 x 34.01 g H2O2/1 mol H2O2 = 0.224 g H2O2

Hope that helps!