Reactivity of Metals, required practical, Electrolysis

What are the steps to the seperating mixtures practical?

1. Gently warm an acid using a bunsen burner

2. add the insoluble solid and stir until the reaction stops happening

3. Filter the solution to remove the excess insoluble solid

4. heat the solution in an evaporating dish above a beaker of water

5. leave the solution to cool and allow more water to evaporate

What is the order of displacement?

• A metal can only displace another metal from a compound if it is located above it in the reactivity series

How can metals less reactive than carbon be extracted from their oxides?

• reducing with carbon because it is cheap and abundant

What is electrolysis?

• the process that splits ionic compounds into their different (constituent) elements

What happens during electrolysis?

• when ionic compounds are melted and dissolved in water, ions are free to move around and solution will conduct electricity

• Positively charged ions move to negative electrode (cathode)

• Negatively charged ions move to the positive electrode (anode)

• Elements are produced

What is the positively charged electrode?

• cathode

What is the negatively charged electrode?

• anode

What is the con of using electrolysis to extract ores?

• lots of energy is needed to extract ores

• which costs a lot of money