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6. Water is treated in two ways what are they?
- 1. water is passed through filter beds 2. chlorine is added to the water
- 1. water is passed through a catalyst bed 2. chlorine is then added to the water
- 1. water is passed through filter beds 2. the water is then passed through a catalyst
7. when calcium carbonate and hydrochloric acid react what are the products?
- calcium nitrate + carbon dioxide + water
- calcium chloride + carbon dioxide + water
- calcium chloride + carbon monoxide + water
- calcium chloride + carbon dioxide + hydrogen
8. When silver nitrate solution is added to bromide ions what colour is the preciptate
- yellow
- green
- pale yelllow
- white