Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 3. Chemical Reactions
Rules for writing chemical equation
Rules for writing chemical equation : Certain rules have to be followed while writing a chemical equation. 1. The reactants taking part in the reaction are written in terms of their symbols or molecular formulae on the left-hand side of the equation. 2. A plus (+) sign is added between the formulae of the reactants. 3. The products of reaction are written in terms of their symbols or molecular formulae on the right-hand side of the equation. 4. A plus (+) sign is added between the formulae of the products. 5. In between the reactants and the products an arrow sign (→) is inserted to show which way the reaction is occurring. A + B → C + D In this chemical equation, A and B are the reactants, and C and D are the products. The arrow indicates that the reaction proceeds towards the formation of C and D.