AP Chemistry Summer Assignment



AP Chemistry Summer Assignment

Summer 2014

Summer Review Practice Test Key

Have the practice test completed by the first day of school. We will have a review test on the second day of class.

1. Answer on a separate sheet of paper.

A. Show all work (for problems that require it)

B. Formula

C. Work with units

D. Answer with correct units

2. Determine the number of significant figures in the following numbers.

A. 0.02 1

B. 0.020 2

C. 501 3

D. 501.0 4

E. 5000 1

F. 5000. 4

3. In your laboratory experiment, you determine that the molar mass of a compound is 34.45 grams/mol. The actual molar mass of this compound is 43.25 grams/mol. What is your percent error? 20.35%

4. How many protons, neutrons, and electrons do the following atoms or ions have? (p+, n0, e-)

A. Ca (20, 20, 20)

B. I- (53, 74, 54)

C. uranium (92, 146, 92)

D. Fe3+ (26, 30, 23)

E. carbon-13 (6, 7, 6)

5. Identify the type of bond in the following compounds (ionic, covalent, metallic):

A. CO2 - Covalent

B. MgCl2 - Ionic

C. Fe-Fe - Metallic

D. FeO - Ionic

6. Name the following ionic compounds:

A. NaCl - sodium chloride

B. MgBr2 - magnesium bromide

C. FeO - iron (II) oxide

D. Co(NO3)2 - cobalt (II) nitrate

7. Name the following covalent compounds:

A. CO2 – carbon dioxide

B. C2H4 – dicarbon tetrahydride

C. N2O3 – dinitrogen trioxide

D. SCl6 - sulfur hexachloride

8. Write the formulas for the following ionic compounds (using the swap ‘n drop method):

A. calcium chloride – CaCl2

B. iron (III) oxide – Fe2O3

C. potassium nitrate – KNO3

D. titanium (IV) phosphate- Ti3(PO4)4

9. Write the formulas for the following covalent compounds:

A. diphosphorus pentoxide – P2O5

B. tricarbon octahydride – C3H8

C. carbon monoxide – CO

10. How many atoms are in 1.2 mol of water? 7.2 x 1023 atoms

11. How much does 6.42 mol of CH4 weigh? 103 g (102.9 g) – 3 sig figs, the underline indicates where significant figures end

12. How many atoms are in 0.0034 grams of NaCl? 3.5 x 1019 atoms

13. Balance the following equations

A. 2 AlBr3 + 3 K2SO4 ( 6 KBr + Al2(SO4)3

B. 2 HCl + CaCO3 ( CaCl2 + H2O + CO2

C. C4H8 + 6 O2 ( 4 CO2 + 4 H2O

14. Balance the following equation, and answer the questions: Zn + 2 HCl ( ZnCl2 + H2

A. How many moles of hydrogen gas can be produced from 2.34 moles of zinc metal?

i. 2.34 moles H2

B. How many moles of zinc chloride can be produced from 2.34 grams of zinc metal?

i. 0.0358 moles of ZnCl2

C. How many grams of hydrochloric acid do you need to react completely with 2.34 grams of zinc?

i. 2.61 g HCl

15. How many grams of KNO3 should be used to prepare 100.0 mL of a 0.500 M solution? 5.06g KNO3

16. Change the following temperatures from Celcius and Kelvin, and vice versa:

A. -34.5°C ( K = 238.5 K

B. 12 K ( °C = -261 °C

Sig figs will not be as important in temperature conversions, however, if you do sig figs, remember that this is addition or subtraction, so the sig fig is where the least precise number ends.

17. Covert the following units of pressure:

A. 721 torr ( atm = 0.949 atm

B. 0.034 kPa ( torr = 0.26 torr

C. 1.53 atm ( mm Hg = 1162.8 mm Hg or 1160 mm Hg

D. 342.34 mm Hg ( torr = 342.34 torr

(value for ‘R’ used was 0.08206)

18. If a sample of gas occupies 3.0 L under 1.5 atm of pressure, at 20.0°C, what volume will it occupy at 2.5 atm and 30.°C? 1.9 L (don’t forget to convert temps, and there the final temp should have had a decimal after it.)

19. How many moles of oxygen will occupy a volume of 2.5 L at 1.2 atm and 25°C? 0.12 moles

20. Find the number of grams of CO2 that exert a pressure of 785 torr at a volume of 323 mL and a temperature of 32°C. 0.59 g CO2

21. Write the formulas for the following polyatomic ions. A correct formula must have the correct charge.

|A. |Nitrate |NO3- |N. |Thiocyanate |SCN- |

|B. |Carbonate |CO32- |O. |Mercury(I) |Hg22+ |

|C. |Phosphate |PO43- |P. |Hydrogen sulfate |HSO4- |

|D. |Sulfate |SO42- |Q. |Cyanide |CN- |

|E. |Sulfite |SO32- |R. |Hydrogen phosphate |HPO42- |

|F. |Nitrite |NO2- |S. |Peroxide |O22- |

|G. |Chromate |CrO42- |T. |Dichromate |Cr2O72- |

|H. |Hypochlorite |ClO- |U. |Acetate |C2H3O2- |

|I. |Oxalate |C2O42- |V. |Chlorate |ClO3- |

|J. |Permanganate |MnO4- |W. |Ammonium |NH4+ |

|K. |Perchlorate |ClO4- |X. |Hydroxide |OH- |

|L. |Chlorite |ClO2- |Y. |Dihydrogen phosphate |H2PO4- |

|M. |Bicarbonate |HCO3- | | | |

| |(hydrogen carbonate) | | | | |

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