Exam

NTA Abhyas

Year

2020

Subject

Chemistry

Chapter

Chemical Equilibrium

NTA Abhyas 2020 · Chemistry · Chemical Equilibrium

The equilibrium constants at 298 K for a reaction A + B ⇌ C + D is...

The equilibrium constants at 298 K for a reaction $A + B ⇌ C + D$ is 100. If the initial concentration of all the four species were 1 M each, then equilibrium concentration of D (in mol $L^{- 1}$ ) will be

Step-by-step solution

$A + B ⇌ C + DK = 100$

$Q = \dfrac{1 \times 1}{1 \times 1} = 1$

Hence $Q < K$ so reaction moves in forward reaction



$\dfrac{( 1 + x{)}^{2}}{{\left(1 - x\right)}^{2}} = 100$

$\dfrac{1 + x}{1 - x} = 10$

$1 + x = 10 - 10x$

$x = \dfrac{9}{11}$

So, $= 1 + x = 1 + \dfrac{9}{11} = 1.818$ M