Do Now - AP - Reaction Rates & Rate Law

Increase in temperature of the reactants can do one of the following

• Slow collision frequency
• Allow less effective collision between the particles
• Cause particles to lose speed
• Increase collision between the particles thus increasing the rate.

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Which factors increase the rate of a reaction?

• decreasing concentration

• increasing concentration

• increasing surface area

• Decreasing Temperature

• Adding a Catalyst

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Increasing the concentration of the reactants will slow down the reaction.

• false 
• true

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium
• cut up the strip of magnesium
• increase the concentration of the hydrocholoric acid
• increase the temperature of the hydrocholoric acid

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 

• A
• B
• C
• D

In which container would you expect a higher reaction rate, and why? (Note: The number of particles is the same in both containers.)

• The left would have a higher reaction rate because it has a greater volume and more collisions will happen.

• The right would have a higher reaction rate because it has a greater volume and more collisions will happen.

• The left would have a higher reaction rate because it has a lesser volume and more collisions will happen.

• The right would have a higher reaction rate because it has a lesser volume and more collisions wil happen.

Which of the following is true?

• The reaction rate of the diagram on the left would be greater because there are more collisions that will happen because of greater surface area.

• The reaction rate of the diagram on the right would be greater because there are more collisions that will happen because of lesser surface area.

• The reaction rate of the diagram on the right would be greater because there are more collisions that will happen because of greater surface area.

• The reaction rate of the diagram on the left would be greater because there are more collisions that will happen because of lesser surface area.

A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is:

2HCl_(aq) + Zn_(s) --> H_2(g) + ZnCl_2(aq)

A piece of Zn metal is dropped into 1.00 L of 0.100 M HCl and the following is collected.

Calculate the rate of reaction for Zn in moles/s

• -2.87 x 10^-3 mol/s

• 2.87 x 10^-3 mol/s

• 7.65 x 10^-6 mol/s

• -7.65 x 10^-6 mol/s