WorksheetsChemical Equilibrium STPM Term 1
Total questions: 15
Worksheet time: 28mins
For the reaction...
SO2 + O2 ⇌ SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
left
right
left and right
neither left nor right
For the reaction...
N2 (g) + 3 H2(g) ⇌ 2 NH3 (g)
If the pressure in the system is increased, which substance(s) will increase in concentration?
N2
H2
N2 and H2
NH3
What is the effect of increasing the pressure on the following equilibrium: 2NO(g) + O2 (g) ⇌2NO2(g)?
The yield of NO2 increases
The yield of NO2 decreases
The reaction is slower
The concentration of O2 increases.
H2(g)+Cl2(g)⇌2HCl(g)
Removing Cl2(g) will
shift equilibrium right
shift equilibrium left
increase pressure
have no change
H2(g)+Cl2(g)⇌2HCl(g)
The forward reaction is exothermic. What will happen to the equilibrium if the temperature is increased?
equilibrium shifts right
equilibrium shifts left
You cannot predict the effect
no change
For the following reaction: H2(g) + Cl2 (g) ↔ 2HCl(g), calculate the concentration of HCl when Keq= 2.3x10-5, [H2]= 0.0056mol, [Cl2]= 0.0048mol.
6.2 x 10-10 M
2.5 x 10-5 M
1.1 M
1.2 M
For the following reaction: H2(g) + Cl2 (g) ↔ 2HCl(g), calculate the concentration of HCl when Keq= 2.3x10-5, [H2]= 0.0056mol, [Cl2]= 0.0048mol.
6.2 x 10-10 M
2.5 x 10-5 M
1.1 M
1.2 M
When pressure decreases, in which direction does the equilibrium shift?
The equilibrium shifts in the direction that increases the number of moles of gas.
The equilibrium shifts in the direction that decreases the number of moles of gas.
The equilibrium does not shift.
The equilibrium shifts always shifts to the right.
The equilibrium shifts always shifts to the left.
Consider this system:
2CCl4(g) + O2(g)<->2COCl2(g) + 2Cl2(g) ΔH = -35 kJ/molrxn
Predict the effect of increasing temperature.
Speed up forward reaction.
Speed up reverse reaction.
No change.
