Day 26 (chemistry) Flashcards
Give the meaning of the term “oxidation”
When a substance gains with oxygen or loses electrons
Give the meaning of the term “reduction”
When a substance loses oxygen or gains electrons
What is an oxidising agent?
A substance which causes another substance to be oxidised
Give another term for a displacement reaction
A redox reaction
Identify the oxidising agent when copper oxide reacts with iron
Copper oxide
Would you expect magnesium to react with iron oxide?
Yes; Magnesium is more reactive than iron
Would you expect silver to react with copper oxide?
No; Silver is less reactive than copper
Complete the word equation: zinc + copper sulfate –>
Zinc + Copper Sulfate –> Zinc Sulfate + Copper
What two other substances are need to make iron rust?
Water and oxygen
Give the chemical name for rust
Hydrated Iron (III) Oxide
Name a sacrificial metal which could be attached to the underside of a ship to prevent it from rusting
Zinc or Magnesium
Steel dustbins can be sprayed with zinc to prevent them from rusting. What name is given to this method of rust protection?
Galvanising
Describe the appearance of a freshly cut piece of sodium
Shiny, silver coloured metal
Why are group 1 metal stored in oil?
To stop then reacting with any oxygen or moisture in the air
