Question

what are the drawbacks of chemical equation and their removal?

Answer 1

Drawbacks of a chemical equation :-
1) Physical states of reactants and products
2) Reversibility of reaction
3) Conditions necessary for reaction to occur
4) Concentrations of solutions of reactants and products
5) Heat Changes
6) Formation of precipitate
7) Evolution of gas
8) Time which is taken by reaction
9) Rate of reaction
10) Extent of reaction
11) Mechanism of reaction

These drawbacks are removed by :-
1) Indication of physical states by symbols
2) Conditions necessary written along  the arrow
3) Concentrations are written by writing dil. for dilute and conc. for concentrated
4) Heat changes are written by writing +QkJ or -QkJ
5) Evolution of gas indicated by arrow pointing upward(↑)
6) Formation of precipitate indicated by arrow pointing downward(↓)
7) Double arrowhead used for reversible reactions (⇄)
8) Rate of reaction indicated by writing slow or fast with products

Answer 2

Answer:

The main drawbacks of a chemical equation are as follows :-

1) doesn't tell the feasibility

2) doesn't tell us about the speed of the reaction

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