1. Fill in the missing word from the equation shown below:
Acid + alkali     →    ............    +   water

3. Pick an neutral oxide from the list

4. This diagram shows the water cycle Where does the energy come from that drives the water cycle?
 

 

5. About 20cm of magnesium ribbon is chopped up into 1cm lengths and placed in a crucible which is then weighed along with its lid.

The crucible is heated strongly and the lid gently raised avery few seconds.

When the reaction is over the crucible + contents + lid are all re-weighed

These are his results:

• Mass of empty crucible + lid  = 51.2g
• Mass of crucible + lid + magnesium (before heating) = 54.3g
• Mass of crucible + lid + contents (after heating) = 54.7g

 

What is the word equation for the reaction that takes place?
 

6. The graph above shows the amount of a substance that dissolves in water at different temperatures.
In the experiment 3 different substances were tested.

How much of substance A dissolves in water at 80ºC?

7. When a substance was burnt it was found to form carbon dioxide and water as products of combustion.
What was being burnt?

8. Flour is INSOLUBLE in water. When flour is shaken with water what will it form?

9. Look at the graph below which shows the solubility of 3 substances in water at diferent temperatures
How is the solubility of substance B effected by temperature?

10. Which would be the best substance to neutralize some spilt hydrochloric acid?

11. An acid would have what pH number?

12. Which of the options below about the properties of a liquid is NOT correct

13. A boy dissolved some salt in warm water. What do we call the resulting mixture?

14. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.

They have the following properties:

A	A yellow, crumbly solid that burns to form a single colourless gas which turns universal indicator red
B	A grey, malleable solid that burns to form a single white alkaline oxide
C	A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen
D	A green solid that decomposes when heated to form a colourless gas and leave a black powder

Which of the substances is likely to be a non-metallic element ?

15. Which of the gases below burns well and can be used as a fuel?

16. The word equation below shows the reaction between iron and copper sulphate solution

Iron + copper sulphate  →  ******** + iron sulphate What is the missing chemical from the equation?

17. A belt is made out of leather because leather is.......

18. A liquid with a pH of 9 would be described as .....

19. 15g of copper foil is heated in a sealed test tube until the copper stops changing colour.
After the experiment had cooled the tube was opened and then re-weighed.

These were his results:

Mass of tube + copper before heating = 75gMass of tube after heating = 75.3gApproximately what mass of oxygen was in the tube?

 

20. What is the name of the chemical which has the formula CH_{4 ?}