Question

2 khco₃ → k₂o + h₂o + 2co₂
which of the following are the reactants in the reaction above?
khco₃
k₂o
h₂o
co₂

Explanation:

Step1: Recall Reactant Definition

In a chemical reaction, reactants are the substances that undergo a chemical change and are located on the left - hand side of the reaction arrow ($
ightarrow$).

Step2: Identify Reactants in the Given Reaction

The given chemical reaction is $2\ KHCO_{3}\
ightarrow\ K_{2}O + H_{2}O+2CO_{2}$. Looking at the reaction, the substance on the left - hand side of the arrow is $KHCO_{3}$ (with a coefficient of 2, but the reactant species is $KHCO_{3}$). The substances on the right - hand side ($K_{2}O$, $H_{2}O$, and $CO_{2}$) are products.

Answer:

The reactant in the reaction is $\boldsymbol{KHCO_{3}}$ (the box corresponding to $KHCO_{3}$ should be selected, and the boxes for $K_{2}O$, $H_{2}O$, and $CO_{2}$ should not be selected as they are products).