WorksheetsS3-Q6-ch2 and Ch3 till factors affecting on rate of reaction
Total questions: 23
Worksheet time: 55mins
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.
Removing O2(g) will
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO3(g) will
shift equilibrium right
shift equilibrium left
increase K
have no change
H2(g)+Cl2(g)⇌2HCl(g)
Increasing the pressure will
shift equilibrium right
shift equilibrium left
You cannot predict the effect
have no change
For the reaction...
heat + N2 + O2 <−> 2NO
If O2 is removed, the concentration of N2 will _______.
increase
decrease
remain the same
double
For the reaction...
N2 + O2 <−> 2NO - heat
If the heat is removed from the chemical system, the concentration of N2 will _______.
increase
decrease
remain the same
double
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
For the following reaction:
H2(g) + Cl2 (g) ↔ 2HCl(g),
calculate the concentration of HCl when Kc= 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
Consider the following reaction :
SO2 (g) + NO2 (g) ↔ SO3 (g) + NO (g)
had reached a state of equilibrium, was found to contain 0.40 M SO3 , 0.30 M NO, 0.15 M NO2 , and 0.20 M SO2. Calculate the equilibrium constant for this reaction.
4
0.42
0.25
1
NaOH is added to an unknown solution. A blue ppt forms. The formula of the ion is:
Fe
Fe3+
Fe2+
Cu+2
Calculate the mass required to prepare 2500 mL of 1.0 M NaOH solution. Given the molar mass for NaOH is 40 g/mol
1000 g
100 g
10 g
1 kg
What is the concentration of a HCl solution if 24.7 cm3 of HCl are completely neutralized by 35.8 cm3 of a 0.25 M NaOH solution?
0.362 M
3.62 M
0.172 M
35.4 M
A mixture of barium hydroxide and barium nitrate its volume is 174 L ,Calculate the volume percentage % of barium nitrate if you know that this solution is required to completely neutralize 45 cm3 of a 0.29 M HNO3 solution.
[MM of Ba(OH)2=171g/mol and its density =25.65g/L]
43.5 %
16.45 %
75 %
35 %
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250 g of H2SO4 completely reacted with aluminum?
[H=1; O=16; S=32; Al=27]
2.62 x 103 g
291 g
450 g
872 g
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)
12 moles of NaClO3 will produce how many grams of O2?
[Na=23; Cl=35.5; O=16]
1.73 x 103 g of O2
576 g of O2
256 g of O2
384 g of O2
2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat
when using a catalyst ------
(you can choose more than one answer)
increases the rate of backward reaction
increases the rate of forward reaction
decreases the time of equilibrium achievement
decreases the activation energy of forward and backward reactions
A closed container of 2 liters volume
N2 + 1/2 O2 <--> N2O
at equilibrium the sum of moles of reactants and products is 17 moles. calculate equilibrium constant Kc.
64 M-1
0.77 M-1
13.5 M-1
17 M-1
When adding 400 ml of HCl 0.2 M to 300 ml of Ca(OH)2 0.2 M, the phenol phthalein indicator turns into -----
colourless
blue
pink (red)
green
Which of the following can be used to differentiate between nitrate and nitrite radicals?
you can choose more than one answer
HCl dil
BaCl2
acidified K2Cr2O7
acidified KMnO4
Amount of water is added to 10 ml of H2SO4 0.3 M till it becomes 0.05M , then the amount of water added is -------
10 ml
50 ml
60 ml
55 ml
