Assignment : Do the study questions, put your name on it and photograph it. Answer key is here.
You will be doing a simple two beaker experiment to observe rates of reaction.
5 marks for finishing the questions and placing your maple leaf on your paper.
criteria:
5 marks, you write your name on every sheet and you answered all questions, including the multiple choice.
4- you completed almost everything. your name is not on every sheet
0-3 - it is a good start, but incomplete
SIMPLE TWO BEAKER EXPERIMENTS: 10 marks: I would like you to try the following experiments and write OR type your observations on a separate piece of paper or digital document. You will need your maple leaf (or a piece of paper with your name on it). FYI if you are unable to make it to class, there is a version of this experiment which can be done from your home kitchen.
MATERIALS:
TWO SMALL BEAKERS: beaker A and beaker B
VINEGAR
BAKING SODA
FOOD COLOURING
2 ALKASELTZER TABLETS
A SCIENCE KETTLE that is only used for LABS.
PROCEDURE
1. HOT VS COLD . Get your cameras out to photograph this experiment: put a drop of food colouring in boiling water. At the same time, put a drop of food colouring in cold tap water. . Observe the diffusion that takes place over one minute. Place your maple leaf beside the boiling water and cold water and take a picture. Write your observations. Explain how this relates to the rates of reaction.
2. CONCENTRATED VS DILUTE: Put some full strength vinegar in a small beaker ( A )and a teaspoon of vinegar in another small beaker (B) . Fill glass B with WATER so it has the same amount of liquid as glass A. Now beaker A has full strength vinegar, beaker B has dilute vinegar.
Now add about a spoonful of baking soda to glass B and glass A. Observe what happens. Take a picture and make sure your maple leaf is in the pic. Explain how this relates to the rates of reaction.
3. WHOLE OR CRUMBLED: Add one WHOLE tablet of alkaseltzer to a small beaker of water and another CRUSHED, OR PULVERIZED tablet of alkaseltzer in another beaker of the same volume of water. Take a picture and make sure your maple leaf is in the pic. Explain how this relates to the rates of reaction.
WRITE YOUR OBSERVATIONS ALONG WITH YOUR PHOTOS and answer all the questions above.
8-10 marks for photographing your experiment with your maple leaf in the picture AND for clearly explaining how it relates to rates of reaction.
5-7 marks for photographing your experiment with your maple leaf in the picture AND for explaining how it relates to rates of reaction
0-4 marks. you included a photo but it doesn't have your maple leaf in either the photo or the explanation
