Lab 14: Rates of Chemical Reaction

Question 1

What is reaction rate?

Answer 1

A measurement of the change in concentration of a product or reactant with respect to time`

Question 2

What are the units for reaction rate?

Answer 2

M/s: molarity/sec

Question 3

What factors affect reaction rates?

Answer 3

Temperature, concentration, and catalyst

Question 4

What is average rate?

Answer 4

The average rate of a reaction between two points in time

Question 5

What is instantaneous rate?

Answer 5

The rate at a given point in time (derivative of the curve)

Question 6

What is collision theory?

Answer 6

The rate of a reaction depends on the frequency of collisions that are energetic enough to result in the formation of the activated complex

Question 7

What is the purpose of the KNO3 in the solution?

Answer 7

It keeps the reaction medium the same in each run in terms of the concentration of ions

Question 8

What is the purpose of the drop of EDTA in the solution?

Answer 8

It is to minimize the effects of of trace quantities of metal ion impurities that would cause spurious effects on the reaction.

Question 9

When does the color change occur?

Answer 9

When the 2.0 X10^-4 of S2O8^-2 (peroxydisulfate) has fully reacted/consumed