Question

when the chemical reaction reaches the equilibrium state then
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Answer 1

Explanation:

When a system has reached equilibrium, no further changes in the reactant and product concentrations occur; the reactions continue to occur, but at equivalent rates. 5. The concept of equilibrium does not imply equal concentrations, though it is possible.

Answer 2

Answer: When the rate of forward and backward reaction of a reversible reaction are same then the chemical reaction reaches equilibrium.

Explanation: Let us consider a reaction,

            $a + b$ ↔ $c + d$

This reaction is a reversible reaction. There are 2 parts in this reaction one is the forward reaction and other is the back ward reaction.

The forward reaction is $a + b$ → $c + d$

Here rate of forward reaction is Rf = kf [a] [b]   { kf is forward rate constant}

The backward reaction is   $c + d$ → $a +b$

Here rate of backward reaction is Rb = kb [c] [d]   { kb is backward rate constant}

 When Rf = Rb the reaction is said to be attained equilibrium.

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