Identify the reactant(s) in the chemical reaction, CO2 + H2O → H2CO3.?

Question

Identify the reactant(s) in the chemical reaction, CO2 + H2O → H2CO3.

A) CO2, H2O, and H2CO3

B) CO2 and H2O

C) H2CO3

D) CO2

Answer 1

Some CO2 will Dissolve in H2O to form H2CO3

B...The 'Reaction' is the the rapid Decomposition of the H2CO3 into CO2 and H2O.

One Actual reaction is CaCO3 + H2O = CaO + H2CO3.

Answer 2

By convention the reactants are those compounds on the left side of the → or = sign. Therefore in your example the reactants are CO2 and H2O = answer B.

For completion, the compounds to the right of the → or = sign are called the products. In your case H2CO3