Question

Hydrogen peroxide, H₂O₂, is a water-soluble compound. The concentration of an aqueous hydrogen peroxide solution that is 3% by mass H₂O₂ is used as an antiseptic. When the solution is poured on a small cut in the skin, H₂O₂ reacts according to the balanced equation below.
2H₂O₂ ==> 2H₂O + O₂
1. Identify the type of chemical reaction represented by the balanced equation.
2. Calculate the total mass of H₂O₂ in 20.0 grams of an aqueous H₂O₂ solution that is used as an antiseptic. Your response must include both a numerical setup and the calculated result.

Answer 1

Answer:

1) Decomposition Reaction

2) 0.6 g H₂O₂

Explanation:

The reaction that takes place is:

2H₂O₂ → 2H₂O + O₂

1) Because one component is broken into two or more products, this is a Decomposition reaction.

2) The concentration of H₂O₂ is 3% by mass, so the total mass of H₂O₂ in 20.0 g of a solution is:

20.0 * 3/100 = 0.6 g H₂O₂

Answer 2

1)The type of chemical reaction represented by the balanced equation is Decomposition Reaction

2) The total mass should be 0.6 g H₂O₂

Identification of the chemical reaction and total mass calculation:

1) The reaction should be

2H₂O₂ → 2H₂O + O₂

Since one component should be broken into two or more products, so this represents the Decomposition reaction.

2) Now The concentration of H₂O₂ is 3% by mass, so the total mass of H₂O₂ in 20.0 g of a solution is:

Now

20.0 of 3% = 0.6 g H₂O₂

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