In this lesson students have a chance to review for their final exam while also performing a fun and engaging lab activity where they get to do an acid and base titration and inflate a balloon on and Erlenmeyer Flask with a hot plate.
For this lab activity there are several materials needed. I provide the following for each lab group:
I begin the lesson by passing out the review lab #1 to students.
I then go over general safety with students including how they should wear their goggles because of the acids/bases, how they should handle the burettes, and how to work with the ER flasks on the hot plate.
I make sure to explain the basics of the burettes to students. This includes how to open and close the stopcock, how to fill the burette carefully with a funnel, and how to keep a beaker underneath the burette in case it leaks.
I tell students that the lab is fairly straightforward and that they should be able to figure out how to answer the questions with the help of their partners. I tell them that if they are stuck as a group they should try their notes first, and if all of them do not get the question, that they should then raise their hands and I will come around to help them.
I then split students into cooperative groups, have them go to their assigned lab stations, and start the lab. For more details about how I use cooperative groups see my reflection from unit 1.
For this section of the lab students are performing their experiments and reviewing semester 2 concepts with the review lab #1.
The first part of the lab involves performing an acid/base titration. Some of the areas where students are confused include:
The second part of the lab involves students placing a ballon on an ER flask that has some water in the bottom, heating it up, and then cooling it down. These are two videos from the lab:
When students are done with their labs I have them turn in. I grade the labs based on level of completion with students who have the lab complete getting a check (100%), those missing several questions a check minus (75%), and those that are missing at least a page worth's of information a check minus minus (50%).
Because students are doing the lab as a group and I am walking around to make sure that they are on task and answering questions, most part students complete their labs and earn a check.
This is an example of one student's completed lab.
As students complete their labs I have them work on their final exam review. This is a paper which I give students after the unit 10 exam, so they have well over a week to complete on their own as homework, as well as when we have extra time at the end of class. I have students turn in the final exam review at the final. I have copies of the answer key for the review for students to check as they are working on the review and have questions.
This is a copy of one student's final review.