Question

How is the rate of a chemical reaction expressed with examples

Answer 1

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Some reactions happen very fast like the precipitation of silver chloride. ... The speed or rate of a chemical reaction is the change in concentration of a reactant or product per unit time. To be specific, it can be expressed in terms of: the rate of decrease in concentration of any of the reactants.

Answer 2

Answer:

The average rate of a chemical reaction is the change in the concentration of the reactant or product divided by the time taken for that reaction to occur.

Explanation:

as an example:-

                                         2Na + Cl2 → 2NaCl

The rate of a reaction is the change in concentration of the reactant or product divided by the change in time.Therefore, the formula of rate of reaction for the above reaction would be:

Rate of reaction =  -(1/2)Δ[Na]/Δt = -Δ[Cl]/Δt = +(1/2)[NaCl]/Δt