National Chemistry

2009 Credit First thoughts

Credit  2009    First thoughts

                         Hints

 

                           SQA Answers

1. (a) What type of compound is maltose ?

(b)  'Fe'  test

 

2. (a) Find flame test in data book.

(b) Write out electronic arrangement of argon.

Write out electronic arrangement of all of the ions (two) in each box.

 

3.(a) Network boiling point - high or low?

When does covalent conduct?

(b) What bonding in calcium fluoride? Does it contain a metal ?

 

4. (a) Reacts with acid.

(b) Page 5 of data book You will have to attempt each pair.

(c) Write the charge on the ions above each name.

Any pair of charges that appear twice will obviously be a wrong answers

 

5. Write in the molecular formula if you can. At least write in the number of carbon atoms using page 6

(a) A definition you should know.

(b) page 6 of data book. Write the figures into the box.

(c) Need a pair - you have two cyclos, two enes and two anes.

 

6.(a) Must make a hydrogen ion.

(b) What gas do fuesl burn in? Must be a reactant.

(c) Invlves iron. Corrosion is oxidiation.

 

7. ppppprotons

 

8. Fraction six is collected last and is deliberately darker.

Ask yourself if each statement is true or false.

 

part 2

 

9. (a) protons = atomic number; neutrons need to be calculated.

(b) Definition you should know. Look at the three atoms.

(c) Must be one of the three atoms.

 

10. (a) Power supply produces electricity.

(b) write out both the ions first.

(c) Since they do something must allow it to happen - ionic compounds!

 

11, (a) What do each of the observations tell you has been formed ?

(b) Unlikely to be same results.

What would be formed when hydrogen burns ?

 

12. (a) What types of bonding are there ?

(b) Draw out electron arrangement for P first of all.

 

13. (a) Acid reaction?

(b)(i) Something must be lost if mass drops.

(ii) Label each axes and make up scale to use up at least half the graph paper.

(c) read up from 3 minutes - make a mark on the graph.

 

14. (a) (i) Should know two process, named after people, for nitrogen chemistry.

(ii) Platinium catalyst - alphabet clue shoul answer part (i).

needs heat but you do not have to keep heating??

(b) First off; mass of 1 mole.

 

15. (a) Circle the boxes which state a reaction has occurred- should give most reactive.

(b) gas from H2O?

(c) Must be extremes. Difficult to name things in the middle

 

16.(a) starch and water reacting.

(b)  Do working beneath. Do hydrogens first since they only appear in one chemical on each side.

(c) Alcohol goes from 8% to 40%.

(d) mass - so calculate mass of 1 mole.

 

17. (a) Involves electrons - use page 7. OIL RIG

(b) Which electrode are electrons made at?

(c) Test for iodine.

(d) Copy from page 7

 

18. (a) Look at structure - break into parts which are the same.

(b) page 6 helps identify the number of carbons.

(c) Look at the elements present - what gases are possible.

 

19. (a) Look at the pattern.

(b) Definition you should know.

(c) Copy out equation and underline the chemical you are told about and the chemical you are asked about.

(d) look at the ethane structure and identify (highlight, write over etc) where the 2 carbon and six hydogens came from.