GCSE Reactions Flashcards
Metal oxide+acid->
Salt+water
Metal+acid->
Soluble salt+hydrogen
Metal carbonate+acid->
Salt+water+carbon dioxide
Ions+ions->
Insoluble salt
Acid+insoluble base->
Soluble salt
Acid+alkali->
Soluble salt+water
Is combustion exo or endothermic?
Exothermic
Is neutralisation exo or endothermic?
Exothermic
Is oxidation exo or endothermic?
Exothermic
Is thermal decomposition exo or endothermic?
Endothermic
Hard water+soap->
Scum
Temporary hard water has ? In it that decompose on heating to make ? Which react with Ça and Mg
HCO3- ions…..=carbonate ions (Mg/Ça carbonate=precipitates)
Heating hard water=
Scale
Sodium carbonate+ Mg or Ca->
CaCO3 or MgCO3
Flame tests: Green- Potassium- Lithium- Calcium- Sodium-
Green- barium Lilac-potassium Crimson-lithium Red-calcium Yellow-sodium
Ion tests: In sodium hydroxide... - white precipitate -white precipitate+dissolves in excess NaoH -blue precipitate -green precipitate -brown precipitate
- white precipitate=Al, Ca, Mg
- white precipitate+dissolves in excess NaoH=Aluminium hydroxide
- blue precipitate =copper
- green precipitate =ironII
- brown precipitate =iron III
Ion test In silver nitrate solution+dilute nitric acid... -white precipitate -cream precipitate -yellow precipitate
- white precipitate-silver CHLORIDE
- cream precipitate- silver BROMIDE
- yellow precipitate- silver IODIDE
Ion test
In barium chloride solution+dilute HCl…
-White precipitate=
-white precipitate=sulfate ions
Nitrogen+hydrogen
Give reaction conditions
Ammonia 450'C Iron catalyst 200 atmospheres Cooled, ammonia liquefies, removed, H+N are recycled
Alcohol+water=
A neutral solution
Alcohol+sodium=
Hydrogen
Ethanol+chemical oxidising agents/microbial action->
Ethanoic acid
Carboxylic acid+water=
Acidic solution
Carboxylic acid+carbonate=
Carbon dioxide
Carboxylic acid+alcohol (+acid catalyst)=
Esters
Ethanol+ethanoic acid=
Ethyl ethanoate
Ammonia+water=
Alkaline solution
Hydrocarbons, metal extraction
Hydrocarbons
Combustion of hydrocarbons
Carbon and hydrogen are oxidised…it releases energy
Cracking hydrocarbons
Heat, vaporise, pass over hot catalyst/ Mix with steam, heat to high temperature for thermal decomposition
Alkenes effect on bromine water
Orange to colourless
Polymerisation
Many monomers join together from alkenes to alkanes
How to make ethanol
Hydration of ethene with steam and catalyst
Or
Yeast turns sugar into CO2 and ethanol
How to harden vegetable oils
Unsaturated hydrocarbons reacted with hydrogen with a nickel catalyst at 60’C (hydrogen added to carbon=carbon bonds)