In the chemical equation H2O2(aq) -> H2O(l) + O2(g), the H2O2 is a ____.?

Question

A) Product
B) Reactant
C) Catalyst
D) Solid
E) Gas


Please help me out. thank you soo much

Answer 1

[Answer: B] Reactant. Reactants are always on the left hand side of a reaction. Products are always on the right hand side. It is not a catalyst because it doesn't speed up the reaction. It is not a solid or a gas because as stated in the equation, it is aq, which means aqueous .

Answer 2

The left... is not always a good indicator. Yes, it is the generally accepted place of the reactant, but try it on the trick-question exam and .... anyway.

OK... "XXXX(aq)" (aq) refers to aqueous solution, so Gas and Solid (E and D) are right out.

C) Catalyst is some unchanged substance that lowers activation energy between reactants... Since H2O2 doesn't exist on the other side of the equation, you can rule out 'unchanged,' and therefore 'catalyst' as well.

Now, Product or Reactant:
Does, in your experience, water react with air to produce something else? ...so These are probably not reactants, nor the H2O2 a product.
On the other hand, have you ever seen hydrogen peroxide release a lot of gas? Ever use it to clean a wound? Ever drop a bit of potato into H2O2? What happened? It fizzed.
So, H2O2 will release a gas (O2), and a remaining fluid (H2O). Here, H2O2 is a reactant (it reacts with a catalyst or foreign matter) to produce a product (the water and oxygen).

Answer 3

2 H2O2 ---> 2 H2O + O2

Answer 4

Reactant - it is on the left side of the equation.

Answer 5

B