Speeds of Reactions

Quiz
•
Chemistry
•
10th Grade
•
Hard
Standards-aligned
Charles Martinez
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which energy profile diagram shows the slowest endothermic reaction?
A
B
C
D
Tags
NGSS.HS-PS1-4
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Reaction 1: 10 g of magnesium ribbon with excess 2.0 mol/dm3 hydrochloric acid
Reaction 2: 5 g of magnesium powder with excess 2.0 mol/dm3 hydrochloric acid
In both experiments, the volume of hydrogen produced, V, is measured against time, t, and the results plotted graphically. Which set of graphs is correct?
A
B
C
D
Tags
NGSS.HS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aqueous hydrogen peroxide decomposes according to the equation:
2H2O2(aq) → 2H2O(l) + O2(g)
When manganese(IV) oxide is added to an aqueous solution of hydrogen peroxide, the speed of decomposition increases because
the kinetic energy of the hydrogen peroxide molecules increases.
the reaction becomes more exothermic.
the hydrogen peroxide molecules collide more frequently.
the minimum amount of energy which hydrogen peroxide molecules must possess in order to react decreases.
Tags
NGSS.HS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The graph shows a curve S which was obtained from the reaction between excess potassium carbonate and 50 cm3 of 1 mol/dm3 of sulfuric acid carried out at room temperature.
What change to the experiment will not result in curve T?
add 50 cm3 of water to the acid
use bigger lumps of potassium carbonate
use 50 cm3 of 0.75 mol/dm3 sulfuric acid
use 100 cm3 of 1 mol/dm3 nitric acid
Tags
NGSS.HS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the height of the peak (P) and the activation energy (Ea) when the temperature of the mixture increases?
P: decreases ; Ea : Moves to the left
P: decreases ; Ea : Moves to the right
P: decreases ; Ea : Does not change
P: increases ; Ea : Moves to the left
Tags
NGSS.HS-PS1-5
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which acid solution, when added to 5 g of zinc granules, would have the highest initial rate of reaction?
25 cm3 of 1.00 mol/dm3 sulfuric acid
25 cm3 of 0.200 mol/dm3 hydrochloric acid
50 cm3 of 1.00 mol/dm3 hydrochloric acid
100 cm3 of 0.100 mol/dm3 sulfuric acid
Tags
NGSS.HS-PS1-5
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