WorksheetsYr 13 revision quiz (Rates, Thermodynamics & Acids & Bases)
Total questions: 20
Worksheet time: 25mins
What is the overall order of the following reaction: Rate = k [Cl2][H+]2[CO]2
3rd order
4th order
5th order
6th order
What are the units of the rate constant, k, for a first order reaction?
No units
s-1
mol dm-3 s-1
mol-1 dm3 s
What are the units of the rate constant, k, for a third order reaction?
s-1
mol-1 dm3 s-1
mol-2 dm6 s-1
mol-3 dm9 s-1
What is the effect of doubling the concentration of X and halving the concentration of Y in the following reaction: Rate = k [X]2[Y]
Increase rate by a factor of 4
Increase rate by a factor of 2
Decrease rate by a factor of 2
No effect on rate
What is the order of reaction for each of the following reactants:?
A: 1st order B: 1st order C: 1st order
A: 2nd order B: 1st order C: 1st order
A: zero order B: 2nd order C: 2nd order
2nd order B: zero order C: 1st order
What is the value of k given that the rate equation is Rate = k [A]2 [B] [C]?
0.9 x 10 -4
0.011
3.3 x 10-3
0.9 x 10-3
In a graphical representation of the Arrhenius equation, what is represented by the gradient of the line?
1/T
ln k
-Ea/RT
-Ea/R
Which of these is NOT an appropriate method for determining rate or reaction?
Measuring loss of mass
Calorimetry
Measuring the volume of gas formed
Measuring a product by titration
What are the units of entropy?
J K-1 mol-1
kJ K-1 mol-1
kJ K mol-1
J K mol-1
Which of the following will have the highest standard molar entropy?
He(g)
C(diamond) (s)
C(graphite) (s)
He (l)
At 900K, when ΔH = +320 kJ mol-1 and ΔS = +150 J K-1 mol-1 what is the Gibbs free energy?
-134,680
185
-185
134,680
For a certain reaction, at a constant temperature, ΔH = +320 kJ mol-1 and ΔS = -150 J K-1 mol-1 What does this indicate about the feasibility of the reaction?
Always feasible
Never feasible
Feasible at high temperatures
Feasible at low temperatures
For a certain reaction, at a constant temperature, ΔH = -320 kJ mol-1 and ΔS = -150 J K-1 mol-1 What does this indicate about the feasibility of the reaction?
Always feasible
Never feasible
Feasible at high temperatures
Feasible at low temperatures
What is the pH of a solution of HCl with a concentration of 0.023mol dm-3?
1.63
1.64
1.638
1.6
What is the pH of a solution of Ba(OH)2 with a concentration of 0.25 mol dm-3?
13.70
13.69
0.60
0.30
The following forward reaction is endothermic: H2O ↔ H+ + OH- How does the pH of water change as temperature is increased?
pH decreases
pH remains unchanged
pH increases
ph decreases then returns to 7
Which of the following is NOT a correct expression?
pH = -log10 [H+]
pKw = -log10 Kw
pKa = log10 Ka
Kw = [H+][OH-]
A student monitored the pH during a titration where nitric acid was added to sodium hydroxide. Which description of the titration curve is correct?
pH 13 at start, equivalence at pH 9, pH 1 at the end
pH 1 at start, equivalence at pH 7, pH 1 at the end
pH 1 at start, equivalence at pH 7, pH 13 at the end
pH 13 at start, equivalence at pH 7, pH 1 at the end
The indicator phenolphthalein would be suitable for a titration between:
A weak acid and a strong alkali
A strong acid and a weak alkali
A weak alkali and a weak acid
None of the above
Which of the following is NOT an appropriate method for making an acidic buffer?
Addition of a solution of the salt of a weak acid to a solution of the weak acid
Addition of a solution of a weak base to an excess of the weak acid
Addition of a solid salt of the weak acid to a solution of the weak acid
Addition of a solution of a strong base to an excess of the weak acid
