Chemistry Kinetics

Quiz
•
Science
•
9th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Excess magnesium powder was added to a beaker containing hydrochloric acid, HCl (aq). The mass of the beaker and its contents was recorded and plotted against time (line I). Which change could give line II?
Doubling the mass of powdered Mg
Using the same mass of Mg ribbon
Increasing the temperature
Using the same volume of more concentrated HCl
Tags
NGSS.HS-PS1-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why does copper affect the reaction?
Decreases the activation energy
Increases the activation energy
Increases the enthalpy change
Decreases the enthalpy change
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
100 cm3 of 10% hydrogen peroxide solution decomposes at 298 K to form water and oxygen.
H2O2(aq) → H2O(l) + O2(g)
The dotted line graph represents the volume of oxygen produced.
Which graph represents the decomposition of an equal volume of a 20% solution under the same conditions?
A
B
C
D
Tags
NGSS.HS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which change does not increase the initial rate of reaction when CaCO3(s) is added to excess HCl(aq)?
Decrease in the size of the CaCO3(s) particles
Increase in the temperature of the reaction mixture
Increase in the concentration of HCl(aq), keeping the same volume
Increase in the volume of HCl(aq), keeping the same concentration
Tags
NGSS.HS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which conditions must be met for a reaction to take place?
I and II only
I and III only
II and III only
I, II and III
Tags
NGSS.HS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which experimental methods could be used to observe the progress of the following reaction? Cr2O72-(aq) + 6I-(aq) + 14H+(aq) → 2Cr3+(aq) + 3I2(aq) + 7H2O(l)
I and II only
I and III only
II and III only
I, II and III
Tags
NGSS.HS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Graph 1 shows a plot of volume of CO2 (g) against time for the reaction of CaCO3 (s) with 1.00 moldm−3 HCl (aq). The acid is the limiting reagent and entirely covers the lumps of CaCO3 (s). Which set of conditions is most likely to give the data plotted in graph 2 when the same mass of CaCO3 (s) is reacted with the same volume of HCl (aq) at the same temperature?
Size of lumps - LARGER; Concentration of Acid mol/L - 1.00
Size of lumps - SMALLER; Concentration of Acid mol/L - 0.05
Size of lumps - SMALLER; Concentration of Acid mol/L - 1.00
Size of lumps - LARGER; Concentration of Acid mol/L - 0.05
Tags
NGSS.HS-PS1-5
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