Unit 1 Review: Equipment, Safety & Classifying Matter

1. Unit 1 Review:Equipment, Safety & Classifying Matter

2. List four indications that a chemical reaction has occurred. • Heat/Light • Color Change • Gas produced • Precipitate

3. _______ does the dissolving in a solution. • Solvent

4. Which piece of equipment do you use for obtaining an accurate measurement of volume? • Graduated cylinder

5. H2 + O2 H2OList the reactant(s) • H2, O2

6. Identify: • Florence Flask

7. Listan example of a homogeneous mixture. • Homogeneous = sugar water, salt water, air

8. ____ is a form of energy • Heat

9. How can you tell that an endothermic process is taking place? • Feels cold to the touch

10. What is the hottest part of a Bunsen burner flame? • Top of inner cone

11. What should you fill the wash bottles with? • Distilled water ONLY

12. _______ is a pure substance that is made from atoms of two or more elements that are chemically combined Compound

13. What is a chemical change? • Chemical change = results in a new substance with new properties

14. Identify: • Evaporating dish

15. H2 + O2 H2OList the product(s) • H2O

16. What are some examples of improper lab attire? • Flip-flops • Long hair not pulled back • Baggy sleeves • Long jewelry • Shorts • No goggles

17. Identify: • Crucible & Cover

18. What are 2 types of pure substances? • Elements & Compounds

19. What is the difference between a proper and improper Bunsen burner flame? • Proper is blue w/ 2 cones and an improper yellows at the top and an inner cone is not present.

20. Identify: • Mortar & Pestle

21. What is a physical change? • Physical change = does not change the identity of matter

22. ______ is the study of the composition, structure and properties of matter • Chemistry

23. You just made sugar water. What is the solute? • sugar

24. What type of change would crumpling up a piece of paper be considered? Physical change

25. What piece of equipment would you use as a cover to the evaporating dish? • Watch glass

26. What type of change would burning a piece of paper be considered? • Chemical change

27. _______ is a pure substance made of only one kind of atom • Element

28. How can you tell that an exothermic process is taking place? • Feels hot to the touch

29. Define “matter”. • Anything that has mass and takes up space

30. ___________________ states that matter is neither created or destroyed by ordinary chemical or physical changes The Law Of Conservation Of Matter

31. Chemical changes are always accompanied by what type of change? • Energy change!

32. ______ is a mixture that is NOT uniform in composition throughout • Heterogeneous mixture

33. ________ is a process that releases heat • Exothermic

34. ________ gets dissolved in a solution • Solute

35. What is the difference between a mixture and a compound? • Mixture = pure substances are physically combined • Compound = pure substances are chemically combined

36. Suppose put an ice cube on your hand. In what direction does heat travel? Be specific • From your hand to the ice cube

37. _________ is a solid that separates from a solution • Precipitate

38. A homogeneous mixture can also be called a ______________? • Solution

39. What does “aqueous” (aq) mean? • A compound is dissolved in water

40. __________ is a mixture that is uniform in composition throughout • Homogeneous mixture

41. Listan example of a heterogeneous mixture. • Heterogeneous = chicken soup, oil and water, sand, soil

42. What is energy? The ability to do work or cause change

43. ________ is a process that absorbs heat • Endothermic

44. How is matter classified?...Draw the flow chart 