National Chemistry

2003 Credit First thoughts

2003 Credit First thoughts
 

1 Fundamental particles
(a) Definition of neutral atom is ...
(b) Mass number is ?

2. (a) What are the elements used in fertilisers?
(b) Fisrt box should be easy - need to make ammonia!

3. Write the molecular formula for each compound in the appropriate box.
(a) use page 6 to get the number of hydrogensin but
(b) use the molecular formulae.
(c) TWO answers
List the three main homologous series that you know.

4.TWO answers
Gases to look out for are usually carbon dioxide, hydrogen and ammonia.

5. TWO answers
Name the products of the reaction.

6. TWO answers
Treat each possible answer as a true/false question.
Page 7 may help

7. TWO answers
Treat each possible answer as a true/false question.
page 7 may help

8. (a) Two parts. Identify acid solution first.
(b) What pH for sodium hydroxide ?

9. (a) What type of bonding in sodium chloride ?
(b) Think types of bonding.

part 2

10. (a) definition
(b)(i) Do not chage any of the given formula.
Copy out on piece of paper and do your working.
(ii) Think bottom of beaker or clue in picture
(c) You only know one shape.

11. (a) (i) look at example given.
(ii) has to be one of the examples given.
(b) Draw a picture.
(c) Beware it is an ion.

12. (a) labels and scales are essential
(b) make a mark on the graph - units
(c) Copy out equation to do working.
Underline the chemical asked about and told about.

13. Read the question from the top of the page.
Chemicals are ethanol(C2H5OH), silver nitrate and sulphuric acid.
(a) P must be one of the chemicals
(b) does not conduct.
(c) Gas at -ve electrode - page 7
(d) What is ethanol in solution with ?

14. (a) (i) Look at the structure
(ii) Structure reacted with Br2
(b) Envisage usual momomer structure

15. (a) Spectator ions are just watching!
(b) Look at calcium phosphate formula in equation.
(c) Mass of 1 mole needed.

16. Read question from top of page.
(a) (i) on the wire.
(ii) Page 7 of data book helps
(b)(i) SEE - colour, gas etc
(ii) Copy from page 7

17. (a) Must be in body
(b) name of reaction
(c) your body
(d) Think on the list of your carbohydrates

18. (a) use page 1 to help.
(b) (i) Identify Li and Ne on the graph
(ii) Identify any elements from group 1

19. (a) (i) Read question from top of page. Look at diagram carefully.
(ii) What is the porous cardbaord container ?
(iii) Switching metals - page 7.
(b) Calculation - circle figures. You are given a formula and asked about the mass, in grams.
Start with mass of 1 mole.

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