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Answers for page 330
First 23 Questions only

Question 1

  1. chemical property
  2. reactants
  3. negative
  4. polyatomic
  5. coefficient
  6. combustion
  7. hydrate
  8. synthesis
  9. rate
  10. concentrated
  11. endothermic
  12. catalyst
  13. indicator
  14. pH
  15. oxide
  16. liming

Question 2

The corrected word or words will be given.
  1. False
    hydrocarbon
  2. True
  3. True
  4. False
    2-
  5. True
  6. False
    Statement is correct but it is not the law see page 222
  7. True for complete combustion
  8. False
    decomopsition
  9. True
  10. True
  11. False
    enzyme
  12. True
  13. True
  14. False
    neutralization
  15. True
  16. False
    water & a salt

Question 3

Not required here; see text book for answers

Questions 4 to 11

4 --- d
5 --- a actually there is no correct answer, it should be phosphorus trichloride
6 --- c
7 --- a
8 --- b
9 --- c
10 --- b
11 --- c or metallic oxide

Question 12

  1. sodium bromide
  2. magnesium iodide
  3. calcium nitrate
  4. iron (III) chloride
  5. potassium sulfate

Question 13

  1. Li3PO4
  2. CaCO3
  3. AgI
  4. AlBr3
  5. PbO

Question 14

  1. PCl3
  2. SO3
  3. carbon tetrabromide
  4. nitrogen dioxide

Question 15

  1. 1, 2, 2, 1
  2. 4, 1, 2
  3. 4, 1, 2
  4. 3, 1, 1
  5. 1, 2, 1, 1

Question 16

  1. single displacement
  2. decomposition
  3. double displacement
  4. combustion
  5. synthesis

Question 17

  1. 3Zn + 2Fe(NO3)3 ------> 2Fe + 3Zn(NO3)2
  2. MgCO3 ----> MgO + CO2
  3. 2AgNO3 + CaI2 ------->2 AgI + Ca(NO3)2
  4. CH4 + 2O2 -----> CO2 + 2H2O
  5. 4K + O2 ----> 2K2O

Question 18

  1. binary FeS
  2. single displacement
  3. not enought time allowed for the reaction to occur and/or temperature is not sufficiently hot enough to overcaome the energy of activation.

Question 19

Not done here; it is a look in the text book for answer question.
Make sure you can handle this question.

Question 20

  1. pH is a measure of the hydrogen ion concentration in a solution. Precisely, pH is the negative logarith of the hydrogen ion concentration measured in moles per litre.
  2. pH of 3 is more acid by a factor of 100

Question 21

  1. bubbling or bubbles forming on the surface of the zinc
  2. single displacement
  3. the coefficients are     1, 2, 1, 1
  4. increase the temperature, increase the concentration of the hydrochloric acid, crush up or make into a powder the zinc, fourth one ??? I don't know.
  5. bubbles will stop being formed and/or the zinc will have dissappeared
  6. add another piece of zinc and look for a reaction or us an indicator

Question 22

  1. X is a metal
  2. Y is a metallic oxide
  3. Z would be a basic solution
  4. litmus paper will turn blue and phenolphthalein will turn red

Question 23

  1. Experiment A 200s,     Experiment B 100 s
    Experiment C 40 s,      Experiment D 20 s
  2. Yes, A must be the starting point, lowest temperature and weakest soltion concentrations
    A to B has a doubling of concentration
    A to C has an increase of temperature; this is a non linear effect
    A to D has an increase in concentration and a doubling in concentration


If you did all these questions, then checked you answers and did any follow-up to ensure that you understand the answer, you shoulddo well on the Unit Test.