Chem paper 1 things to remember Flashcards
Why is sodium/copper not used to produce a salt with Sulfuric acid
Doesn’t react with Sulfuric acid
Could explode
Would you say a solution is alkali or alkaline
Alkaline
In a compare question, what must you give as well as differences
Similarities
Why would an energy change graph increase
Because the reaction is Exothermic
Why does a polystyrene cup give better results than a glass beaker
Because it’s a better insulator
Give examples of random errors in an experiment
Inconsistent stirring, different starting temperature
What do you have to mention when describing how ionic compounds are formed
How the ions react to form the compound at the end
What happens in a hydrogen fuel cell
Hydrogen is oxidised to produce water
When changing concentration, what must you keep the same
Volume - so change the amount of both the solute and the solution to keep it even
Why does iron conduct thermal energy
Because iron has delocalised electrons which move through the structure and carry HEAT
In titration, what should you do before adding the acid to the alkali
Add the alkali using a pipette
What is a weak acid
Its H+ ions PARTIALLY ionise in solution
