Question

Write three information obtained from chemical equation.

Hint:

To easily remember the information from a chemical equation, use the acronym RPS: Reactants & Products, Proportions (mole ratios/stoichiometry), and States of matter. Sometimes, reaction conditions (like temperature, pressure, catalyst) are also written above or below the arrow.

Answer 1

A balanced chemical equation provides several pieces of crucial information, both qualitative and quantitative. Three key pieces of information are: \begin{enumerate} \item Reactants and Products: The equation identifies the substances that are consumed in the reaction (the reactants, written on the left side) and the substances that are formed (the products, written on the right side). For example, in \(2H_2 + O_2 \rightarrow 2H_2O\), we know hydrogen and oxygen are reactants, and water is the product.
\item Stoichiometric Relationship (Mole Ratio): The coefficients in front of the chemical formulas in a balanced equation represent the mole ratio in which reactants combine and products are formed. In \(2H_2 + O_2 \rightarrow 2H_2O\), the equation tells us that 2 moles of hydrogen gas react with 1 mole of oxygen gas to produce 2 moles of water. This allows for quantitative calculations.
\item Physical States: The physical state of each substance can be indicated by symbols in parentheses. These symbols are (s) for solid, (l) for liquid, (g) for gas, and (aq) for an aqueous solution (dissolved in water). For example, \(CaCO_3(s) \rightarrow CaO(s) + CO_2(g)\) tells us that solid calcium carbonate decomposes into solid calcium oxide and carbon dioxide gas.
\end{enumerate}