Add cold tap water to about an inch from the rim. Stir the ice cubes in the jar for about a minute so that the temperature evens out. Right before you start the activity use a spoon to remove the cubes. Be careful when handling the hot water.
I then give students several minutes to read over the lab on their own. After minutes I ask students the goal of the lab. I ask for volunteers and they let me know that it is to test the factors that affect reaction rates. I then go over what students will be doing for the prelab and have them spend several minutes doing the prelab on their own.
This is a movie of me going over this with students. I then review safety with students by letting them know that they must wear the goggles at all times and to make sure to not point the film canisters at students because the tops will pop off vigorously. Finally I break students into cooperative groups and have them go up to their lab stations.
This is a picture of what a station looks like for the lab. When they get up to their stations they first finish their data tables, and then begin the lab activity. This is a movie showing one group of students performing one of their trials.
As students are working I walk around and check for several things I make sure that they are recording observations as well as the time for the canister's top to pop off.
I check that students are ALL wearing their goggles. I make sure that they understand that the first cylinder is their control; therefore, the one tha they should be comparing their other trials to. This movie shows me doing this with my students.
As students complete the lab I have them begin to work on the analysis questions. When all students are done with the lab and working on the analysis questions I have them pause so that we can work on the extension together.
This is found on the last page of their alka seltzer and rates lab. For this extension students read an article discussing how aspirin should be taken if someone is having a heart attack. Basically, it says that the aspirin should be chewed as that it gets into the bloodstream and works faster.
The goal is for students to come up with a claim that the article gives similar results as their lab because they both show that by increasing surface area that reactions happen faster. This is a movie of me going over this with one class.
Most of my students missed at least one point, and most forgot to revisit their predictions. These are several examples of some graded labs which show some of the common mistakes by students.
Because so many students forgot to go back to their predictions I feel that I need to do a better job of helping students with this next time. Therefore, I made some changes to the lab which I discuss in the reflection, Common Confusions with the Lab.
Alka seltzer student example 3 alka-seltzer-lab-rubric Alka seltzer lab student example 1 Alka seltzer student example 4 Alka seltzer lab student 2.To begin this lesson I go over the lab with students. To do this I first pass out the alka seltzer and rates lab paper.
I . Key concepts Chemistry Molecules Buoyancy Density Polarity. Introduction Have you sever seen a lava lamp? They might look complicated, but you can make your own using common kitchen supplies.
Alka-Seltzer is a tablet used to treat indigestion. It's made of two chemicals, an acid and a base. Acids are molecules that can donate small charged particles called hydrogen ions. (Original title: Hydrogen Peroxide - Curse or Cure?
first published in Dr Willaims' ALTERNATIVES Newsletter probably in the s) When it comes to hydrogen peroxide therapy there seems to be only two points of view.
Supporters consider it one of the greatest healing miracles of all time. International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research.
When a parody of a particular work is more popular than the original work, often to the point where those unfamiliar with the source material will believe that the parody is its own thing.