Chemical changes Flashcards
What is the reactivity series?
How reactive different metals are
What will any metal above hydrogen do?
React with acids to make a salt and hydrogen
What will any metal above carbon need to be extracted by?
Electrolysis
What happens if an acid reacts will with metal?
A salt and hydrogen will be produced
What is the ionic equation for neutralisation?
H+ and OH- = H(2)O
What is a base and an alkali?
A base is any metal oxide
An alkali is a soluble base
What happens if you react a alkali with an acid?
A salt and water are produced
What happens if you react a base with an acid?
A salt and water are produced
What happens if you react a metal carbonate with an acid?
A salt, water and carbon dioxide are produced
How do you make copper chloride?
You put 25 ml of hydrochloric acid in a beaker
Heat the acid until it’s almost boiling
Add the copper oxide and stir
Keep adding copper oxide until not all of reacts with the acid
Filter the remaining copper oxide out
Evaporate the water out
What is titration?
The process of finding out the concentration of a substance
How do you do titration?
1) Put 25 ml of the substance that you know the concentration of into a conical flask using a pipette
2) Add 5 drops of an indicator e.g. Phenolphthalein
3) Place the conical flask on a whit tile to see the colour change better
4) Fill a burette with the solution you don’t know the concentration
5) Add the solution in the burette until the indicator changes colour read the value in the burette to 2 decimal places
6) Do one rough estimate of how much you need to add to make the indicator change
7) Do two exact titrations that are within 0.1 of each other
