Question

In the reaction $A+B\rightleftharpoons AB$, if the concentration of A and B is increased by a factor of 2, it will cause the equilibrium concentration of AB to change to :

• A. Two times to original value
• B. Three times to original value
• C. Same
• D. Zero

Answer 1

The correct option is A Two times to original value

For $A+B\rightleftharpoons AB$
$K=\frac{\left[AB\right]}{\left[A\right]\left[B\right]}$
When $2A+2B\rightleftharpoons 2AB$
$K=2AB$