Reaction Rate Calculations

Which of the following is a possible unit for rate of reaction?

• cm³/s

• m/s

• N

Tags

NGSS.HS-PS1-5

Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

Tags

NGSS.HS-PS1-5

Which of the following will increase the frequency of successful collisions?

• Increasing the temperature

• Decreasing the pressure

• Decreasing the concentration

Tags

NGSS.HS-PS1-5

Which of the following will increase the proportion of successful collisions?

• Increasing the temperature

• Increasing the pressure

• Increasing the concentration

Tags

NGSS.HS-PS1-5

Which of the following would give a steeper curve on a graph of volume of gas against time?

• Low temperature

• Low concentration

• Using a catalyst

Tags

NGSS.HS-PS1-5

What piece of apparatus could be used to measure the volume of gas produced in a reaction

• Gas syringe

• Beaker

• Top pan balance

Products will form faster if____________

• the particle size of the reactants are larger.

• temperature is decreased.

• concentration of the reactants are increased.

• the reaction is not stirred.

Tags

NGSS.HS-PS1-5

What criteria must be met for reactant collisions to result in a successful product?

• The reactants must collide with each other

• The reactants must collide with enough energy and be in the right positions

• The reactants must have enough energy to form the activated complex

Which of the following is/are the fundamental idea(s) of collision theory?

• Molecules react by colliding together

• The effective collisions must occur with certain minimum amounts of energy 

• In a large sample, the greater the number of effective collisions, and the faster the rate of reaction

• All of the above

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger

• Blue, because the activation energy is lower

• both reaction progress at the same rate

Tags

NGSS.HS-PS1-4