1. Name a substance with a pH value more than pH7

2. If Magnesium hydroxide (indigestion powder) were added to vinegar which of the answers would best describe what would happen?

3. 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 magnesium reacting with?
 

4. How can alcohol be obtained from wine?

5. What colour is sulphur?

6. Fom the list of properties below pick the one which describes a non-metallic element:

7. How is carbon dioxide made in the laboratory?

8. Pick a substance that burns with a bright white flame

9. Some copper foil is heated in a sealed test tube until the copper stops changing colour. What gas remains in the test tube?

10. After filtering a mixture what do we call the liquid that drips through the filter paper?