<p> Chemistry FINAL Review Worksheet. Please answer all the questions below in your notebook and not on this sheet. For the test you should focus on all the vocab, notes, post labs & demos we have worked on or that have been handed out and the chapters we have covered. The best thing to do is to study all the chemistry stuff in your notebooks (ESPECIALLY this review worksheet). I highly encourage you to hand write (not type or photocopy) all the information you can on one piece of paper (8.5 x 11 - both sides) and use it for the test. You get 5 points Extra Credit for stapling that one page of notes to your test. You should focus on the following:  Vocabulary and Chemical Reaction Notes 1, 2, & 3.  All post-lab questions, demo notes, and any notes you have on chemical reactions, solution chemistry and acids & bases.  Go over all the assigned readings for clarification of material. (Chapter 6, 7, & 8) 1. Can you have a chemical reaction if the reactants NEVER mix? When the reactants mix they will form what? 2. If you just change the physical appearance of something, do you have a chemical reaction? What must change (break and/or reform) to have a chemical reaction take place? 3. I mix two different substances together. How would I know that the reactants (the stuff I mixed together) underwent a chemical reaction? List at least three characteristics that show a chemical reaction has possibly taken place. 4. Nylon is an example of a synthetic fiber made from mixing two compounds. Nylon is produced when two reactants are mixed together to form a more complex product than the reactants alone. What type of chemical reaction is the making of Nylon? 5. When animals die their bodies decompose. Complex molecules like proteins, sugars, and lipids (fats) break down into simpler compounds and elements. What type of reaction is this? 6. Continuing with above question: In The Lion King, they talk about the circle of life. What does decomposition reactions have to do with the circle of life? 7. Reaction rate or how fast a reaction will proceed (happen) depends on a couple of things. List four things that can affect a chemical reaction. Give examples of how to make a reaction move faster and how you could also slow it down. 8. Why is combustion considered an exothermic reaction? What is being given off or produced? Where does it go? 9. If you react ethanol and oxygen (in the presence of heat) what products will form </p><p> from this chemical reaction? (Hint: ethanol is C2H5OH and oxygen is O2)? 10.Endothermic reactions are the opposite of exothermic chemical reactions in terms of heat energy movement. What is being absorbed by the products during an endothermic reaction? Where is that heat energy being taking from? Give an example of this type of reaction that you might find in the kitchen. 11.What percent of matter in a chemical reaction is destroyed forever and ever? What can never happen to the mass of the products that are formed at the end of a chemical reaction compared to the mass of the reactants that are present at the start of the reaction? 4/26/2018 00bb868f60a637aeed145c77c18a37f0.doc 12.If you spilled a strong acid on the floor, what would you pour on it? What are you trying to do to the acid? 13.What two products result from the reaction above? 14.What does “from concentrate” tell you about your orange juice? 15.What is the difference between concentrated and dilute? Which type of acid would you want to have poured on you by accident (not that you would want it poured on you)? Why? 16.Acetone is good at getting paint and resin off of building materials and tools. It tends to DISSOLVE things into solution. What is acetone (look at your vocab)? 17.If the paint is dissolved by the acetone what does the paint now become in the solution? 18.Mr. Mathot likes his coffee saturated with sugar. What does this mean? 19.He dislikes Kool-Aid that is too dilute. What does this mean? How can you fix Mr. Mathot’s Kool-Aid so he likes it? 20.Why don’t oil and vinegar in your salad dressing mix? If they did mix, the oil would be made to be ______(soluble or insoluble) in the vinegar. 21.Is water boil and vaporizing a chemical reaction or a phase change? Explain why it is one and not the other? 22.Anna tells Olaf that he is melting. Olaf tells Anna, “Some people are worth melting for.” As Olaf stands near the fire and melts, is he undergoing a: chemical reaction, phase change, or physical change? Explain your answer. 23.Is dry ice subliming a chemical reaction? What type of change is it? 24.List three acids or acidic substances. List three characteristics of acids (what they react with, taste like, what color they turn litmus paper, etc.). 25.List three bases or basic substances. List three characteristics of bases (what they react with, taste like, what color they turn litmus paper, etc.).</p><p>4/26/2018 00bb868f60a637aeed145c77c18a37f0.doc</p>