AP Chem Unit 2

Chapter 2 Atoms, Molecules and Ions

Daily Answers 2

1. A

2. A

3. D

4. A

5. A

6. B

7. C

8. B

9. B

10. A

11. B

12. B

13. C

14. B

15. A

16. A

17. C

18. A

19. B

20. 70.906 g.

21. ratio is 1.5 to 1 or 3 to 2, ratios are whole numbers

22. 0.53 g.

23. 115.4 g of S and 230.34 g of O

24. 39 p, 50 n/ 32 p, 41 n/ 12 p, 12 n/92 p, 146 n

25. 78 p, 117 n, 77 e / etc

26. transition, halogen, noble gas, alkaline earth, alkali metal, lanthanide

27. M/N/M/N/N/M/M/M/N

28. lose 1 (+1), gain 3 (-3), gain 1 (-1), lose 1 (+1)

29. CaCl₂

30. Ca₃(PO₃)₂, KNO₄

31. lead (II) iodide, ammonium chloride, iron (III) oxide, lithium hydride, cesium chloride, osmium tetraoxide, chromium (III) hydroxide, sodium acetate, potassium dichromate, sodium sulfate, potassium dihydrogen phosphate

32. NaCN, SnF₂, NaHSO₄, Pb(NO₃) ₂, Fe₂O₃, Ca₃ (PO₄) ₂, NaBrO₃

33. K₂CO₃, Mg(OH) ₂, N₂O₄, HIO, FeCl₃, SnO₂, RbNO₃, KClO₃, CCl₄, NaIO₃, KMnO₄, H₂SO₃, K₂HPO₄, NH₄C₂H₃O₂, (NH₄) ₂Cr₂O₇, HBr

34. persulfuric, iodous, hydrobromic, nitrous

35. HNO₄, HF, H₂SO₃, HCN, H₂SO₂, HC₂H₃O₂

36. Ag⁺¹ = 2 or 4, Cu⁺² = 4 or 6, Cr⁺³ = 6

37. pentaamminecloro cobalt (III) chloride, potassium hexacyano ferrate (III), diaquo dinitro iron (III) tetracloro ferrate(II)

38.[ Pt(NH₃)₃Br]Cl₃, K₃CoF₆, Cr(NH₃)₄Fe(CN)₆

39. In this amount of space? You have got to be kidding!

40. butane, 2,2 dimethyl pentane, propanol, 2 hexene (a double bond gets a location and –ene suffix), pentanoic acid, eth-oxy-propane

41. This are just like the problems of #4 on an actual AP Chemistry test. They give NO points if there is any little thing wrong. Concentrate on the Common Ion table and really know the formulae and valences…and good luck.