Chemical Reaction Rates Quiz

What two conditions must be met for a chemical reaction to occur?

• Particles must collide with enough energy and correct orientation
• Particles must collide with enough energy only
• Particles must collide in the correct orientation only
• Particles must collide with low energy

How is the rate of reaction defined?

• The number of particles present
• The number of successful collisions per second
• The energy of particles
• The orientation of particles

What happens to the rate of reaction when temperature increases?

• It decreases
• It remains the same
• It increases
• It fluctuates randomly

Why does a higher temperature increase the rate of reaction?

• Particles have less energy
• Particles have more energy
• Particles move slower
• Particles have less mass

What effect does a lower concentration have on the rate of reaction?

• Increases the rate of particles colliding

• Decreases the rate of particles colliding

• Has no effect on how many particles collide

• Causes the reaction to stop

Why does a higher concentration increase the rate of reaction?

• More particles are available to react
• Less particles are available to react
• Particles have less energy
• Particles move slower

What is the relationship between successful collisions and reaction rate?

• More successful collisions lead to a slower rate
• More successful collisions lead to a faster rate
• Successful collisions have no effect
• Successful collisions decrease energy

Which factor does NOT affect the rate of reaction?

• Temperature
• Concentration
• Color of reactants
• Orientation of particles

What happens to particles at a lower temperature?

• They have more kinetic energy

• They have change the orientation of how they collide

• They move faster
• They have less kinetic energy

Hydrochloric acid + Sodium hydroxide --> Water + Sodium chloride

Identify which option would INCREASE the rate of reaction

• Placing the sodium hydroxide solution in an ice bath before mixing

• Using 0.1mol/L of hydrochloric acid instead of 2mol/L

• Increasing the amount of sodium hydroxide particles in the solution

• Adding Universal Indicator to see the colour changes