Reaction Rate Challenge

Reaction Rate Challenge

Objective: To work with your partner to devise three different experiments to change the reaction rates via concentration, temperature and surface area.  For each section of the lab, you will need to see Ms. Cotta before you can proceed to the next part.

Pre-Lab Question:

1. Explain for each factor how you could speed up and slow down a reaction for each factor.

            a. concentration:

                        in order to speed up we will:

                        in order to slow down we will:

            b. temperature:

                        in order to speed up we will:

                        in order to slow down we will:

            c. surface area

                        in order to speed up we will:

                        in order to slow down we will:

Procedure:
1. Write out the steps of how you are testing your different factors and how you are changing the conditions when you experiment.

Post-Lab Questions: (pg. 99, 100 ,102)

1) Draw a before and after drawing for each of your three experiments. Make sure to label the drawings with which factor you used and if it was speeding up or slowing down.  Your drawings should show the molecules that we cannot see and what is happening to them.

2) Were there any of your experiments that did not work out the way that you expected? Explain why you think it was the case?

3) Imagine you are in a science laboratory and producing hydrogen gas from the reaction of zinc metal and hydrochloric acid.  The reaction is occurring too fast for you to collect all the hydrogen gas.  Name two different ways you would slow it down.