Physical Science Fall 07 Review

1. Physical Science Fall 07 Review 7. Chemical Reactions

2. Chemical Reactions How many atoms of each element are found in Na2SO4?

3. Chemical Reactions How many atoms of each element are found in Na2SO4? Na= 2 S = 1 O = 4

4. Chemical Reactions How many atoms of each element are found in Ba(OH)2?

5. Chemical Reactions How many atoms of each element are found in Ba(OH)2? Ba = 2 O = 2 H = 2

6. Chemical Reactions How many atoms of each element are found in (NH4)3PO4

7. Chemical Reactions How many atoms of each element are found in (NH4)3PO4 N = 3 H= 12 P = 1 O = 4

8. Chemical Reactions In a chemical reaction the substances on the left of the  are called ____________ and the substances on the right are called __________ .

9. Chemical Reactions In a chemical reaction the substances on the left of the  are called reactants and the substances on the right are called products .

10. Chemical Reactions In chemical reactions ________ speed up a reaction and _________ slow down a reaction.

11. Chemical Reactions In chemical reactions catalysts speed up a reaction and inhibitors slow down a reaction.

12. Chemical Reactions In a combustion reaction, oxygen (O2) reacts with another substance to produce _____ and ______.

13. Chemical Reactions In a combustion reaction, oxygen (O2) reacts with another substance to produce carbon dioxide (CO2) and water (H2O)

14. Chemical Reactions In a combustion reaction, oxygen (O2) reacts with another substance to produce carbon dioxide (CO2) and water (H2O)

15. Chemical Reactions Balance the following reaction: AlBr3 + K KBr + Al

16. Chemical Reactions Balance the following reaction: AlBr3 + 3K 3KBr + Al

17. Chemical Reactions What type of reaction is this? AlBr3 + 3K 3KBr + Al

18. Chemical Reactions What type of reaction is this? Al is displaced and Br binds to potassium: Single displacement AlBr3 + 3K 3KBr + Al

19. Chemical Reactions Balance the following reaction: CH4 + O2 CO2 + H2O

20. Chemical Reactions Balance the following reaction: CH4 + 2O2 CO2 + 2H2O

21. Chemical Reactions What type of reaction is the following reaction? CH4+ 2O2 CO2 + 2H2O

22. Chemical Reactions What type of reaction is the following reaction? Oxygen gas reacts to produce carbon dioxide and water: combustion. CH4+ 2O2 CO2 + 2H2O

23. Chemical Reactions What type of reaction is the following reaction? Bi + F2 BiF3

24. Chemical Reactions What type of reaction is the following reaction? Two substances form ONE, more complex substance. synthesis Bi + F2 BiF3

25. Chemical Reactions Balance the following reaction. Bi + F2 BiF3

26. Chemical Reactions Balance the following reaction. 2Bi + 3F2 2BiF3

27. Chemical Reactions Balance the following reaction. Al2O3 Al + O2

28. Chemical Reactions Balance the following reaction. 2Al2O3 4Al + 3O2

29. Chemical Reactions What type of reaction is this? 2Al2O3 4Al + 3O2

30. Chemical Reactions What type of reaction is this? A compound breaks down into two simpler compounds; decomposition 2Al2O3 4Al + 3O2

31. Chemical Reactions What type of reaction is this? A compound breaks down into two simpler compounds; decomposition 2Al2O3 4Al + 3O2

32. Chemical Reactions What type of reaction is this? FeO + PdF2 FeF2 + PdO

33. Chemical Reactions What type of reaction is this? Ions switch places. Double displacement FeO + PdF2 FeF2+ PdO

34. Chemical Reactions Balance the reaction? FeO + PdF2 FeF2 + PdO

35. Chemical Reactions Balance the reaction? FeO + PdF2 FeF2 + PdO It IS balanced

36. Chemical Reactions When there is a net release of energy during a chemical reaction (usually in the form of heat) it is __________, but if energy is absorbed and the temperature decreases it is ________.

37. Chemical Reactions When there is a net release of energy during a chemical reaction (usually in the form of heat) it is exothermic , but if energy is absorbed and the temperature decreases it is endothermic.

38. Chemical Reactions _____ ______ is the minimum amount of energy needed to start a chemical reaction.

39. Chemical Reactions Activation energy is the minimum amount of energy needed to start a chemical reaction.

40. Chemical Reactions Which of the following is NOT true of a mole? • contains 6.02 x 1023 particles of a substance • atomic number of an element is equal to its molar mass. • is represented by Avogadro’s number • mole ratios cannot be determined in a chemical reaction

41. Chemical Reactions Which of the following is NOT true of a mole? • contains 6.02 x 1023 particles of a substance • atomic number of an element is equal to its molar mass. • is represented by Avogadro’s number • mole ratios cannot be determined in a chemical reaction

42. Chemical Reactions What is the molar mass of one mole of Argon?

43. Chemical Reactions What is the molar mass of one mole of Argon? Find argon (Ar) on the periodic table. The atomic mass equals one molar mass = 40 g/mol

44. Chemical Reactions What is the mass of 2 moles of carbon?

45. Chemical Reactions What is the mass of 2 moles of carbon? Find carbon (C) on the periodic table. The atomic mass equals one molar mass = 12 g/mol 2 mol C x 12 g C / 1 mol C = 24 g C

46. Chemical Reactions What is the mass of 1 mole of sodium chloride (NaCl)?

47. Chemical Reactions What is the mass of 1 mole of sodium chloride (NaCl)?

48. Chemical Reactions What is the mass of 1 mole of sodium chloride (CaCO3)?

49. Chemical Reactions What is the mass of 1 mole of sodium chloride (CaCO3)?