Download chemical reactions ppt

What makes the matter lab
Problem
When you combine 2 or more substances, how can you
tell if there has been a change in matter?
Hypothesis
As a group come up with your hypothesis.
Remember it is an IF/THEN statement.
Test/Experiment
materials needed:
goggles
test tube rack
0.1 M Copper (II) Sulfate solution
0.1 M Ammonia Solution
0.1 M Silver (I) Nitrate Solution
0.1 M Sodium Chloride Solution
50 mL beaker
0.1 M Hydrochloric Acid solution
Sodium Bicarbonate powder
10x100 mm test tubes
Thermometer
data table
Par
t
1
2
3
Reactant
Observatio
n (write
formula)
add 2nd reactant
Observation
(write formula)
Color change
Yes/no -record
color
Temperature
Gas/precipitate
(Which one/both/neither)
Test/Experiment - Procedure
Part 1 and 2 are demonstrations by the instructor
Part 3: Copper sulfate and ammonia
In a clean 10x100 mm test tube, add 20 drops of a 0.1 M Copper (II) Sulfate
solution.
Note the starting color of the solution in your lab notebook.
Then add in 20 drops of the 0.1 M Ammonia Solution.
Record any and all changes in your lab notebook.
Put waste in the waste container.
4
Part 4: Silver (I) Nitrate and Sodium chloride
In a clean 10x100 mm test tube, add 20 drops of 0.1 M
silver (I) nitrate.
Record observations of the starting solution in your lab
notebook.
Add in 20 drops of 0.1 M sodium chloride.
Record any and all changes in your lab notebook.
Put waste in waste container.
5
Part 5: Hydrochloric Acid and Sodium Bicarbonate
In a clean 10x100 mm test tube, add 20 drops of 0.1 M Hydrochloric acid.Use
the thermometer to measure the temperature change of the chemical
reaction.
Record observations of the starting solution in your lab notebook.
Add in 0.10 g of Sodium Bicarbonate. Use the thermometer to measure the
temperature change of the chemical reaction.
Record any and all changes in your lab notebook.
Waste can go down the sink - make sure you run lots of water with it!
clean up procedure
All waste from parts 3 and 4, must be disposed of in the
beaker designated. All waste from reaction 5 can be
poured down the drain followed by copious amounts of
water. Be sure to wash all glassware and dry it before
returning it to your lab drawers.
Remove goggles on the way back to your seats.Make sure
you have all information on your paper from the lab
area.
data table
Part
1
2
3
Reactant
add 2nd reactant
observation observation
Color change
Temperature
Gas/precipitate
Test/Experiment
Analysis:
When/then
Your group should be able to write your analysis
statement(s) in the proper form.
Conclusion
Write your conclusion. It should be the short story of
your lab. Include what you thought would happen as
well as what did happen. Also include any ‘unusual’ or
not expected things that happened while doing the lab.
This should be a paragraph.
Questions
1. Write the reactants for parts 1 and 2 in separate chemical equations.
2. Write the reactants for parts 3, 4, and 5 in separate chemical equations.
3. Was there evidence of a chemical change for part 3? If so, what?
4. Was there evidence of a chemical change for part 4? If so, what?
5. Was there evidence of a chemical change for part 5? If so, what?
6. When you combine 2 or more substances, how can you tell if there has
been a change in matter?
Questions
8. Why would it be important to have the state of reactants and products in a chemical
equation?
9. Finish the reactions for 1,2 and 3. Make sure to include the state of matter!!