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Investigation 4- Fizz Quiz. Safety Review Norms for Dealing with Chemicals 1.Let teacher know if you have a spill so it can be cleaned up immediately.

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Presentation on theme: "Investigation 4- Fizz Quiz. Safety Review Norms for Dealing with Chemicals 1.Let teacher know if you have a spill so it can be cleaned up immediately."— Presentation transcript:

1 Investigation 4- Fizz Quiz

2 Safety Review Norms for Dealing with Chemicals 1.Let teacher know if you have a spill so it can be cleaned up immediately 2.Keep chemicals all clothes and skin and away from eyes 3.Rinse with water if chemicals do contact skin, eyes, or clothes 4.Never taste laboratory chemicals. 5.Wash hands after activity

3 Our Chemicals For This Investigation Are:  Citric Acid  Baking Soda  Calcium Chloride **

4 Do You Remember??? 1.How can you make a solution? 2.How do you know if a mixture is a solution? 1.What does solubility refer to?

5 Title: Getting to know our chemicals  Purpose: To gain a better understanding of the three chemicals will be working with during this investigation. Date:

6 Q? Will these three chemicals make solutions when mixed with water?

7 Baking Soda and Calcium Chloride Procedure- 1. Label one cup baking soda 2.Get one spoonful of baking soda and put it in the cup 3. Add 50 ml of water using a syringe 4. Mix the water and baking soda with a craft stick 5. Observe and record in your notebook 6. Repeat steps 1-5 using Calcium Chloride

8 Observations (Ob)

9 Conclusion (C) How are the three chemicals alike and how are they different?

10 LOL Content:

11 Title: Chemical Reactions Purpose: To mix combinations of solid materials with water and observe changes that occur. Date:

12 Q1? What happens when a solution is made with water and two different solutes? Q2? How do you know when a chemical reaction has occurred?

13 Procedure (Pro)

14 Procedure

15 Procedure:

16 Conclusion (C)  Today I learned……  Today I Observed…..  Today I noticed…..  I am still wondering about….

17 Let’s Talk!  What do you think caused the fizzing in cup 1 and 3?  What do you think the white stuff is in cup 1?

18 What is a chemical Reaction?

19 Evidence of a Reaction  Did a chemical reaction take place in cup 1? If yes how do you know?  Did a chemical reaction take place in cup 2? If yes how do you know?  Did a chemical reaction take place in cup 3? If yes how do you know?  What new material formed?

20 Conclusion  Today I learned my evidence is…..  My data did/ did not support my prediction because…………  Some questions or lingering thoughts I am having are…………

21 LOL WORD BANK Chemical Reaction- A When two or more materials (chemicals) are mixed together and a change occurs, a chemical reaction has taken place. Precipitate- is a solid material that forms as a product of a reaction Change- is the process of becoming something different

22 LOL cont CONTENT:  What happens when a solution is made with water and two different solutes? Some times when two (or more) chemicals are mixed, changes take place and a new materials form.  How do you know when a chemical reaction has occurred? Changes, such as heat, gas formation, and precipitate formation, are evidence or a chemical reaction.

23 Title: Reaction Products Purpose: To use filtering and evaporation to separate and study the products of the reactions. Date:

24  Q1? Can the products of a chemical reaction be separated to study further?

25 Procedure: 1.Get a filter setup- funnel coffee filter 2.Filter the mixture in cup 1 3.Bring the coffee filter to the back table to dry 4.Keep the liquid

26 Q2? How can you find out if the liquid that came through the filter is a solution

27 Procedure 2  1. Get 2 evaporation dishes.  Put 20 ml of the solution in each dish.  Raise your hand when both dishes are ready to be take to the evaporation tray.  Clean up desk area and begin science story “Ask the Chemist” and answer the questions.

28 Review  Which chemical reacted to form a gas?  Which chemicals reacted to for a precipitate?

29 BREAKPOINT— WAITING FOR THE EVAPORATION PROCESS

30 Observations  Do you recognize the crystals? Have you seen similar crystals before? DATE :

31 Observations Cont

32 Conclusion  Today I learned my evidence is…..  My data did/ did not support my prediction because…………  Some questions or lingering thoughts I am having are…………

33 LOL Content: 1.How can you find out if the liquid that came through the filter is a solution? If the liquid is a solution, it might be separated by evaporation Ex) we found the salt in the mixture from cup 1 after we evaporated it.

34 Title: Reaction in a Zip Bag Purpose: To create chemical reactions in a zip bag. Date:

35 Q? What will happen if you put calcium chloride, baking soda, and water in a closed bag? Pre-

36 Safety Review Norms for Dealing with Chemicals 1.Let teacher know if you have a spill so it can be cleaned up immediately 2.Keep chemicals all clothes and skin and away from eyes 3.Rinse with water if chemicals do contact skin, eyes, or clothes 4.Never taste laboratory chemicals. 5.Wash hands after activity

37 Procedure 1.One person from your group needs to get one level spoon of calcium chloride and one level spoon of baking soda and put in in the zip bag. 2.Close the bag almost completely but leave enough room to insert a syringe. 3.Press out all of the air. 4.Have one person from your group go and get 50 mL of water in a syringe 5.One person needs to hold the bag while another member quickly adds the 50 mL of water. 6.CLOSE THE BAG IMMEDIATELY!!! 7.Once bag is close all members need to observe and take turns holding and gently shaking the bag. 8.Be sure to write you observations in your notebook.

38 Observations

39 Reactant  When two chemicals react when they are mixed, the chemicals are called reactants. *Only chemicals that actually react are called reactants.

40 Let’s Review???  What were the reactants that produced the gas and precipitate in the reaction we just observed?

41 Q? What might happen if you repeat the bag investigation with citric acid and baking soda? Pre-

42 Procedure 1.One person from your group needs to get one level spoon of citric acid and one level spoon of baking soda and put in in the zip bag. 2.Close the bag almost completely but leave enough room to insert a syringe. 3.Press out all of the air. 4.Have one person from your group go and get 50 mL of water in a syringe 5.One person needs to hold the bag while another member quickly adds the 50 mL of water. 6.CLOSE THE BAG IMMEDIATELY!!! 7.Once bag is close all members need to observe and take turns holding and gently shaking the bag. 8.Be sure to write you observations in your notebook.

43 Observations  What was different?  Which reaction produced more gas? How do you know?  What do you think will happen if we do the bag experiment with all three??

44 Conclusion  Today I learned my evidence is…..  My data did/ did not support my prediction because…………  Some questions or lingering thoughts I am having are…………

45 LOL Word Bank: Reactants-When two chemicals react when they are mixed, the chemicals are called reactants.

46 Title:Class Demonstration Purpose: To observe and notebook about a variety of chemical reactions

47 Observation 1-  Calcium Chloride, Citric Acid, Baking Soda and water in a zip bag  What do you notice???

48 Observation 2  Chalk and Vinegar  What do you notice???

49 Observation 3  Dry chalk from when we filtered our reactants with vinegar What do you notice???

50 Observation 4  Test the precipitate from the Three-reactant bag with Vinegar.  What do you notice???

51 Conclusion  Today I learned my evidence is…..  My data did/ did not support my prediction because…………  Some questions or lingering thoughts I am having are…………


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