ICSE Class 7 Answered

 Steps Involved in Writing Chemical Equations: 

• In a chemical reaction, the reactants are written on the left hand side and the products on the right hand side of the equation.
• An arrow (→) pointing towards the products is inserted between the reactants and the products. It also represents the direction of the reaction.
• A single arrow (→) indicates the direction in which the reaction proceeds.
• A double arrow  indicates a reversible reaction, i.e. the products recombine to form the reactants.
• A plus sign (+) is inserted between two or more reactants or products formed.
• If reactions are carried out under specific conditions of temperature, pressure, catalyst etc., then these conditions are mentioned on the arrow.
• The chemical equation can be made more informative by mentioning the physical states of the reactants and products.
• If gas is liberated as a product then it is represented by an arrow pointing upwards (↑). If the product formed is in the form of a precipitate, it is represented by an arrow pointing downwards (↓).