level: Reactivity test and Extraction
Questions and Answers List
level questions: Reactivity test and Extraction
| Question | Answer |
|---|---|
| What do Potassium, sodium, and lithium form when reacted with water? | a metal hydroxide + hydrogen gas |
| Potassium with water | 1) Reacts very quickly 2) The Hydrogen produced ignites instantly and the metal also sparks and burns with a lilac flame |
| sodium with water | fizzes rapidly and melts to form a ball that moves around on the water surface |
| lithium with water | fizzes steadily and floats becoming smaller until it disappears |
| What are the metals that react with dilute acid | magnesium, aluminium, zinc, iron and lead |
| What are the metals that dont react with dilute acids | copper, silver gold and platinum |
| What do metals form when they react with dilute acids | salt + hydrogen gas |
| Why are most metals found as compounds | because the metal as reacted with other elements in the past |
| Why is carbon used to extract metals | 1) It's cheap and abundant 2) Can only happen if carbon is higher in the reactivity series than it |
| How does carbon extract metals | 1) In the reduction the metal oxide losses oxygen to form a pure metal and this is done by heating the metal oxide in the presence of carbon (often used in form of coal) |