UNIT ONE REVIEW!

Complete the following questions to help you prepare for your first test! The answer key will be on my weebly (dowscience.weebly.com)

If the name of the compound is given, write the formula. If the formula of the compound is given, write the name. Also state whether it is ionic, covalent, acid, or hydrate.

1. lead(II) nitrate Pb(NO3)2

2. sodium carbonate Na2CO3

3. dinitrogen trioxide N2O3

4. potassium iodide KI

5. AgNO3 Silver nitrate

6. barium nitrate Ba(NO3)2

7. Na2SO3 ∙3H2O sodium sulphite trihydrate

8. hydrochloric acid HCl

9. P4F6 tetraphosphorous hexafluoride

10. sodium nitrate NaNO3

11. barium acetate Ba(CH3COO)2

12. H2SO5 persulphuric acid

13. CO carbon monoxide

14. Ba(OH)2 barium hydroxide

15. FeCl3 iron (III) chloride

16. hyponitrous acid HNO

17. aluminum sulfate pentahydrate Al2(SO4)3 ∙ 5H2O

18. calcium hydroxide Ca(OH)2

19. tin(II) oxide SnO

20. sodium perchlorate NaClO4

21. copper(I) dichromate Cu2Cr2O7

22. ZnS zinc sulphide

23. H2S hydrosulphic acid

24. Fe(ClO)2 iron (II) hypochlorite

Predict the products for the following reactions and balance the final product. Also state the type of reaction that is taking place.

Answer the following questions on exothermic and endothermic reactions:

1. Change 1. When calcium carbonate forms calcium oxide and carbon dioxide heat is absorbed.Change 2. Calcium oxide releases heat when shaken with carbon dioxide.Which line BEST describes these changes?

1.   change 1 is exothermic; change 2 is endothermic

2.   change 1 is endothermic; change 2 is endothermic

3.   change 1 is exothermic; change 2 is exothermic

4.   change 1 is endothermic; change 2 is exothermic

2. Which of the following involves a chemical reaction?

1.   cooking a cake

2.   filtering sand from water

3.   fractionally distilling oil

4.   melting ice

3. Which of these involves a chemical reaction?

1.   boiling water

2.   apples decaying

3.   magnetizing iron

4.   ice melting

4. Which of these processes is always exothermic?

1.   evaporation

2.   insulation

3.   combustion

4.   Melting

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

1.   exothermic

2.   activated

3.   Endothermic

4.   a decomposition

6. Which of these process is always exothermic?

1.   melting

2.   condensing

3.   boiling

4.   Evaporation

7. Which of these process is always endothermic?

1.   burning

2.   condensation

3.   freezing

4.   Boiling

8. Which of the following energy changes corresponds to the change in enthalpy (∆H)?

1. energy change 1

2. energy change 2

3. energy change 3

4. energy change 4

9. Which of the following statements is true regarding the graph on the right?

1. An exothermic reaction with a +∆H

2. An exothermic reaction with a -∆H

3. An endothermic reaction with a +∆H

4. An endothermic reaction with a -∆H

10. Below is an equation that represents the combustion of methanol. Draw a graph to represent the reaction. Be sure to label your axes, and include the reactants, products, and change in enthalpy.

2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) + 726 kJ

Is it an exothermic or endothermic reaction? Exothermic (combustion is ALWAYS exo!)

How do you know? There is 726kJ being released… energy is lost