Samples of sodium carbonate powder were reacted with separate samples of excess hydrochloric acid. Na 2 CO 3 (s) + 2HCl (aq) → CO 2 (g) + 2NaCl (aq) + H 2 O (l) Reaction I: 1.0 g Na 2 CO 3 (s) added to 0.50 mol dm −3 HCl (aq) Reaction II: 1.0 g Na 2 CO 3 (s) added to 2.0 mol dm −3 HCl (aq) What is the same for reactions I and II?

Average rate of production of CO 2

What decreases the activation energy of a reaction?

Increasing collision frequency of reactants

Which change increases the rate of formation of hydrogen when zinc reacts with excess hydrochloric acid, assuming all other conditions remain the same? Zn(s) + 2HCl(aq) → ZnCl 2 (aq) + H 2 (g)

Decreasing the size of the zinc particles while keeping the total mass of zinc the same

Adding water to the hydrochloric acid

Increasing the volume of hydrochloric acid

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?

Using the same volume of more concentrated HCl

Doubling the mass of powdered Mg

Using the same mass of Mg ribbon

Copper catalyses the reaction between zinc and dilute sulfuric acid. Zn(s) + H 2 SO 4 (aq) → ZnSO 4 (aq) + H 2 (g) Why does copper affect the reaction?

Decreases the activation energy

Increases the activation energy

CaCO 3 (s) + 2HCl(aq) → CaCl 2 (aq) + H 2 O(l) + CO 2 (g) Which change does not increase the initial rate of reaction when CaCO 3 (s) is added to excess HCl(aq)?

Increase in the volume of HCl(aq), keeping the same concentration

Decrease in the size of the CaCO 3 (s) particles

Increase in the temperature of the reaction mixture

Increase in the concentration of HCl(aq), keeping the same volume

Graph 1 shows a plot of volume of CO 2 (g) against time for the reaction of CaCO 3 (s) with 1.00 moldm −3 HCl (aq). The acid is the limiting reagent and entirely covers the lumps of CaCO 3 (s). Which set of conditions is most likely to give the data plotted in graph 2 when the same mass of CaCO 3 (s) is reacted with the same volume of HCl (aq) at the same temperature?

Size of lumps - SMALLER; Concentration of Acid mol/L - 1.00

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 - LARGER; Concentration of Acid mol/L - 0.05

100cm 3 of a 1.00 mol dm -3 solution of hydrochloric acid is added to 2.00 g of small pieces of calcium carbonate at 20 °C. The volume of carbon dioxide produced against time is plotted to give curve P . Which change will produce curve Q , given that calcium carbonate is always the limiting reagent?

Increasing the concentration of the hydrochloric acid to 2.00 mol dm -3

Increasing the volume of the hydrochloric acid to 200 cm 3

Increasing the mass of calcium carbonate to 4.00 g

Replacing the 2.00 g of small pieces of calcium carbonate with 2.00 g of larger pieces of calcium carbonate

The diagram represents the Maxwell‒Boltzmann energy distribution curve of the reactants for a chemical reaction with different activation energies, and . What is the reason why the rate of the reaction with activation energy energy E a2 is greater?

More frequent collisions between the particles occur.

More energetic collisions between the particles occur.

Which change increases the rate of a chemical reaction?

Increasing the surface area of a solid reactant

Increasing the size of solid reactant particles

Decreasing the concentration of aqueous reactants

Decreasing the pressure of gaseous reactants

Which statement best describes and explains the effect of a catalyst on the rate of a chemical reaction?

The rate increases because more colliding particles have the energy needed to react.

The rate increases because the frequency of collisions between particles increases.

The rate increases because the activation energy increases.

The rate increases because more molecules are present.

Which statement about the kinetic theory is not correct?

All the particles in water have the same amount of energy at 298 K.

The particles in ice vibrate about fixed points.

The particles in steam have more energy than the particles in ice.

Evaporation of water occurs at all temperatures between 273 K and 373 K when the atmospheric pressure is 101 kPa.

Hydrochloric acid is reacted with large pieces of calcium carbonate, the reaction is then repeated using calcium carbonate powder. How does this change affect the activation energy and the collision frequency?

Activation energy - STAYS CONSTANT ; Collision frequency - INCREASES

Activation energy - INCREASES ; Collision frequency - INCREASES

Activation energy - INCREASES ; Collision frequency - STAYS CONSTANT

Activation energy - STAYS CONSTANT ; Collision frequency - STAYS CONSTANT

What is the best definition of rate of reaction ?

The increase in concentration of a product per unit time

The time it takes to use up all the reactants

The rate at which all the reactants are used up

The time it takes for one of the reactants to be used up

Topic 6 SL Chemistry Kinetics

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11th - 12th Grade

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

calcium carbonate is added to hydrochloric acid.
Which graph represents the production of carbon dioxide when excess calcium carbonate is added to the same volume of hydrochloric acid of double concentration?

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain temperature.

The maximum is higher and to the left of A.

The maximum is higher and to the right of A.

The maximum is lower and to the right of A.

The maximum is lower and to the left of A.

Tags

NGSS.HS-PS3-2

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which properties can be monitored to determine the rate of the reaction?
Fe (s) + CuSO₄ (aq) → Cu (s) + FeSO₄ (aq)
I. change in volume
II. change in temperature
III. change in colour

I and II only

I and III only

II and III only

I, II and III

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which will increase the rate of reaction between calcium carbonate and hydrochloric acid?
I. an increase in temperature
II. an increase in concentration of hydrochloric acid
III. an increase in particle size of calcium carbonate

I and II only

I and III only

II and III only

I, II and III

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which is the activation energy of the forward reaction?

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

X has the higher molar mass.

Y has the higher molar mass.

X has the higher average kinetic energy.

Y has the higher average kinetic energy.

Tags

NGSS.HS-PS3-2

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.
CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)
Which reaction has the greatest rate?

Concentration of HCl - HIGHER; Surface area of same mass of CaCO₃ (s) - LARGER

Concentration of HCl - LOWER; Surface area of same mass of CaCO₃ (s) - SMALLER

Concentration of HCl - LOWER; Surface area of same mass of CaCO₃ (s) - LARGER

Concentration of HCl - HIGHER; Surface area of same mass of CaCO₃ (s) - SMALLER

Tags

NGSS.HS-PS1-5

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Topic 6 SL Chemistry Kinetics

calcium carbonate is added to hydrochloric acid.
Which graph represents the production of carbon dioxide when excess calcium carbonate is added to the same volume of hydrochloric acid of double concentration?

The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain temperature.

Which properties can be monitored to determine the rate of the reaction?
Fe (s) + CuSO₄ (aq) → Cu (s) + FeSO₄ (aq)
I. change in volume
II. change in temperature
III. change in colour

Which will increase the rate of reaction between calcium carbonate and hydrochloric acid?
I. an increase in temperature
II. an increase in concentration of hydrochloric acid
III. an increase in particle size of calcium carbonate

Which is the activation energy of the forward reaction?

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.
CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)
Which reaction has the greatest rate?

Which conditions are required for the reaction between two molecules?
I. a collision
II. E ≥ E_a
III. proper orientation

The dotted line represents the formation of oxygen, O₂ (g), from the uncatalysed complete decomposition of hydrogen peroxide, H₂O₂ (aq). Which curve represents a catalysed reaction under the same conditions?

What is the activation energy of the reverse reaction?

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Topic 6 SL Chemistry Kinetics

calcium carbonate is added to hydrochloric acid.Which graph represents the production of carbon dioxide when excess calcium carbonate is added to the same volume of hydrochloric acid of double concentration?

The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain temperature.

Which properties can be monitored to determine the rate of the reaction?Fe (s) + CuSO4 (aq) → Cu (s) + FeSO4 (aq) I. change in volume II. change in temperature III. change in colour

Which will increase the rate of reaction between calcium carbonate and hydrochloric acid? I. an increase in temperature II. an increase in concentration of hydrochloric acid III. an increase in particle size of calcium carbonate

Which is the activation energy of the forward reaction?

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)Which reaction has the greatest rate?

Which conditions are required for the reaction between two molecules? I. a collision II. E ≥ Ea III. proper orientation

The dotted line represents the formation of oxygen, O2 (g), from the uncatalysed complete decomposition of hydrogen peroxide, H2O2 (aq). Which curve represents a catalysed reaction under the same conditions?

What is the activation energy of the reverse reaction?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

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calcium carbonate is added to hydrochloric acid.
Which graph represents the production of carbon dioxide when excess calcium carbonate is added to the same volume of hydrochloric acid of double concentration?

Which properties can be monitored to determine the rate of the reaction?
Fe (s) + CuSO₄ (aq) → Cu (s) + FeSO₄ (aq)
I. change in volume
II. change in temperature
III. change in colour

Which will increase the rate of reaction between calcium carbonate and hydrochloric acid?
I. an increase in temperature
II. an increase in concentration of hydrochloric acid
III. an increase in particle size of calcium carbonate

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.
CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)
Which reaction has the greatest rate?

Which conditions are required for the reaction between two molecules?
I. a collision
II. E ≥ E_a
III. proper orientation

The dotted line represents the formation of oxygen, O₂ (g), from the uncatalysed complete decomposition of hydrogen peroxide, H₂O₂ (aq). Which curve represents a catalysed reaction under the same conditions?