Q. 55.0( 2 Votes )

Explain the rules fo

Answer :

Certain rules have to be followed in 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 sign of plus(+) 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 sign of plus (+) is added between the formulae of the products.
5. In between the reactants and the products an arrow sign(→) is marked to show which way the reaction is occurring.
A + BC + 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. 6. Special conditions, such as heat or electrical current, needed to bring about a reaction are mentioned are the arrow mask.
2KNO3 2KNO2 + O2
2H2 + O2 2H2OSodium chloride solution gives a white curdy white precipitate of silver chloride when it reacts with silver nitrate solution.Reactants: Sodium chloride NaCl and silver nitrate AgNO3
Products: Silver chloride AgCl and sodium nitrate NaNO3
Condition: mixing at room temperature
Sodium chloride + silver nitratesilver chloride + sodium nitrate
NaCl + AgNO3 AgCl + NaNO3
NaCl + AgNO3AgCl + NaNO3.

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