3714902
| Questão | Responda |
| Name 5 things Calcium Carbonate is used for | 1. Toothpaste 2. Bread 3. Make up 4. Medicines 5.Cement Accept: Chalk, Glass, Bricks, Neutralise soils |
| What is the symbol for Calcium Carbonate? | CaCO3 |
| What does Calcium Carbonate turn into when heated and what is the symbol? | Calcium Oxide CaO |
| What does Calcium Oxide turn into when water is added and what is the symbol? | Calcium Hydroxide Ca(OH)2 |
| What does Calcium Hydroxide turn into when carbon dioxide is added and what is the symbol? | Calcium Carbonate CaCO3 |
| What is the common name of Calcium Hydroxide solution? | Limewater |
| What elements are found in Calcium Carbonate? | Calcium, Carbon, and Oxygen |
| Explain why Calcium Carbonate removes acidic gases from emissions in power station chimneys? | Calcium Carbonate is an alkali which neutralises the acidic gases in the chimneys |
| What is the balanced equation for the reaction of Calcium Hydroxide with Carbon dioxide? | Ca(OH2) + CO2 -> CaCO3 + H2O |
| Name 3 disadvantages of digging up quarries | 1. Lots of noise 2. Polluted air with dust and sand 3. Can be dangerous to unstable houses/buildings |
| What is the pH colour for neutral? | Green |
| How does antacid work? | The alkali in the antacid neutralises the acid build up in your stomach and esophagus |
| What is the acid called in your stomach/ | Hydrochloric Acid |
| What would happen if you add Sodium Hydroxide (pH 14) into Hydrochloric Acid (pH 1)? Only give pH as a hint | It would neutralise and bring the pH to 7 |
| Explain why Calcium Carbonate removes acidic gases from emissions in power station chimneys? | Calcium Carbonate is an alkali which neutralises the acidic gases in the chimneys |
| What can you add to something to find out its pH (acid or alkali)? | Universal indicator |
| What colour would the UI turn if it's an acid? | Red/Orange |
| What colour would the UI turn if it's an alkali? | Blue/Purple |
| What is thermal decomposition? | Breaking a substance down with heat |
| What is another name for Thermal decomposition? | Thermolysis |
| What is the test for Carbon dioxide? | If the limewater turns cloudy |
| Spell neutralisation | Neutralisation |
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