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 Hydrochloric Acid solution 0.1 M Ammonia Solution                                 Sodium Bicarbonate powder 0.1 M Silver (I) Nitrate Solution                                     0.1 M Sodium Chloride Solution                                      10x100 mm test tubes 50 mL beaker                                                                         Thermometer

data table (write formula) Part Reactant Observation (write formula) add 2nd reactant Observation  Color change Yes/no -record color Temperature Gas/precipitate (Which one/both/neither) 1 2 3

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 Reactant observation add 2nd reactant Color change Temperature Gas/precipitate 1 2 3

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  Write the reactants for parts 1 and 2 in separate chemical equations. Write the reactants for parts 3, 4, and 5 in separate chemical equations. Was there evidence of a chemical change for part 3?  If so, what? Was there evidence of a chemical change for part 4?  If so, what? Was there evidence of a chemical change for part 5?  If so, what? 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!!