Factors Affecting Reaction Rate Independent Practice

A solution's concentration is decreased, and the temperature is lowered. This will

• Increase the rate of reaction

• Decrease the rate of reaction

• Play a role in collision theory

• Invalidate collision theory.

Increasing the surface area, number of particles and temperature increases the rate of reaction because...

• Particles are more likely to collide with the correct orientation

• It makes the system bigger and easier to see

• Particles are less likely to collide with the correct orientation

• This doesn't increase the rate of reaction

Increasing the temperature increases the rate of reaction by

• Increasing the activation energy

• Decreasing the activation energy

• Increasing the frequency of collisions between reacting molecules

• Decreasing the frequency of collisions between reacting molecules

Given the reaction

Fe (s) + 2HCl (aq) --> FeCl₂(aq) + H₂ (g)

5.0 grams of powdered iron will react faster than 1.0 gram of solid iron because the powdered iron

• has less surface area

• has more surface area

• is less dense

• is more dense

A 5.0 gram sample of Fe (s) will be placed in 100 mL of HCl (aq). Which changes will result in the fastest rate of reaction?

• increasing the surface area of the Fe (s) and increasing the concentration of the HCl (aq)

• increasing the surface area of the Fe (s) and decreasing the concentration of the HCl (aq)

• decreasing the surface area of the Fe (s) and increasing the concentration of the HCl (aq)

• decreasing the surface area of the Fe (s) and decreasing the concentration of the HCl (aq)

Which factors have the greatest effect on the reaction rate between AgNO₃ (aq) and Cu (s)?

• solution concentration and temperature

• solution concentration and pressure

• molar mass and temperature

• molar mass and pressure

• less than 48 s, because there are more effective particle collisions per second

• less than 48 s, because there are less effective particle collisions per second

• more than 48 s, because there are more effective particle collisions per second

• more than 48 s, because there are less effective particle collisions per second