Chemistry Kinetics

Chemistry Kinetics

9th Grade

15 Qs

quiz-placeholder

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Chemistry Kinetics

Chemistry Kinetics

Assessment

Quiz

Science

9th Grade

Hard

NGSS
HS-PS1-5, HS-PS1-4

Standards-aligned

Created by

Lisa Thompson

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

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

Media Image

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

Media Image

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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