C1a revision notes

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  • Created on: 08-11-10 12:19
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C1a
Sodium goes yellow in a flame test
Sodium goes yellow in a flame test
Sodium goes yellow in a flame test
Sodium goes yellow in a flame test
Potassium goes lilac in a flame test
Copper goes green in a flame test
Calcium goes red in a flame test
Calcium goes red in a flame test
Calcium goes red in a flame test
Calcium goes red in a flame test
Calcium goes red in a flame test
Add sodium hydroxide to copper iron or zinc and a precipitate is formed
Copper form blue precipitate
Iron forms red/green precipitate
Zinc forms white precipitate
A proton has a positive charge
A neutron is neutral
An electron has a negative charge
Exothermic gives out heat eg combustion
Endothermic takes in heat e.g decomposition
The periodic table is organised by atomic number
The atomic number is how many protons there are
There is the same amount of electrons as there are protons
The combined number of protons and neutrons is the mass number
Cooking is an irreversible chemical reaction
VERY IMPORTANT

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An acid plus a base makes a salt and water
You can use salts for fertilisers fireworks colouring agents or to aid burning (combustion) of fuel
Acid plus a metal hydroxide or oxide also makes a salt and water
BUT
An acid plus a metal carbonate makes a salt and water AND carbon dioxide
In a dehydration reaction water is removed
e.…read more

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Silver
Gold
Platinum
A metal MORE reactive than carbon must be extracted from its ore by electrolysis (electricity)
Gas can be collected by a gas syringe
Collection over water (only for insoluble salts)
Upwards delivery for gases lighter than air
Downwards delivery for gases heavier than air
You can test chlorine as it will bleach litmus paper white
Oxygen will relight a glowing splint
Carbon dioxide with turn limewater cloudy
Ammonia will turn red litmus paper blue
Hydrogen will make a splint go out with…read more

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The HIGHER up the element in the halogen group the more reactive it is
Group 8 is also known as the noble gases or group 0
They have a full shell of electrons and are very un-reactive
They are colourless gasses at room temperature
Transition metals are a big group of metals
They are typical metals so are
Electricity and heat conductors malleable shiny high melting points (apart from mecury) and are
ductile dense and strong
Transition metal examples are gold silver iron nickel and…read more

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