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WorksheetsReaction Rates and Equilibrium
Total questions: 10
Worksheet time: 9mins
A chemical reaction has reached equilibrium when,
the concentrations of the reactants and products are the same
the concentrations of the reactants and products become constant
the forward reaction begins
the reverse reaction begins
When a catalyst is added to a reaction at equilibrium, the rate of the reverse reaction
decreases and the rate of the forward reaction decreases
decreases and the rate of the forward reaction increases
increases and the rate of the forward reaction increases
increases and the rate of the forward reaction decreases
The difference in enthalpy, ΔH, of the reactants and products in a chemical reaction is also known as
heat of reaction
reactant energy
activation energy
product energy
NaCl <-----> Na+ + Cl-
If the above reaction is reversible and reaches equilibrium, and then some Na+ added,
the concentration of Na⁺ will increase
the reaction rate to the right would increase
more NaCl(s) will be produced
the concentration of Na+ will increase and the reaction rate to the right would increase
H2 + Br2 ------> 2 HBr
If some hydrogen is removed
More HBr will be produced
the reaction will go to the right
More bromine will be produced
less bromine will be produced
2NO (g) + O2 (g) <-------> 2 NO2 (g)
An increase in pressure will cause the euqilibrium to
shift to the right
shift to the left
remain unchanged
N2 + 3H2 <------>2 NH3 + heat
An increase in temperature will produce
more NH3
less NH3
a shift to the right
less N2
H2 + I2 <-------> 2HI
What is the Keq of the following reaction, if the concentrations at equilibrium are [H₂]=0.7, [I₂]=0.3 and [HI]=0.6?
1.7
0.5
2.9
0.15
If the Keq = 0.65
the forward reaction is favored
the reverse reaction is favored
not enough information is given
2 H2S <------> 2 H2 + S2
When the contents were analyzed they were 0.6 mole of H₂S and 0.80 mole S₂ in a 1L container and Keq = 0.016. What is the concentration of H2?
0.007
0.08
0.04
0.2
