metals, their reactions & bonding Flashcards
what kind of gas is carbon dioxide
greenhouse gas
what gases in the atmosphere are known to act like an insulating layer
carbon dioxide, methane and water vapour (greenhouse gases)
how does deforestation affect the amount of carbon dioxide in the atmosphere
fewer trees means less carbon dioxide is removed from the atmosphere
how does burning fossil fuels affect the amount of carbon dioxide in the atmosphere
carbon that was ‘locked up’ in these fuels is being released as carbon dioxide
what does reacting an acid and a metal give you
a salt + hydrogen
describe how sodium reacts with an acid
explosively
how would you investigate the differences in reactivity of a variety of metals
-set up 3 boiling tubes and fill with dilute HCL/ dilute sulfuric acid
-place equal pieces of the metals in the separate test tubes
how do you test for hydrogen
lit splint = squeaky pop
what does reacting a metal and water give you
metal hydroxide + hydrogen
describe how metals like potassium and lithium react with water
vigorously
what will copper not react with
water or steam
what does the reaction of potassium + water give enough energy for
enough to ignite hydrogen
what is the order of the reactivity series
-potassium
-sodium
-lithium
-calcium
-magnesium
-aluminium
-zinc
-iron
-copper
-silver
-gold
what is rusting
when iron corrodes
when does rusting occur
when iron is in contact with oxygen and water
what kind of reaction is rusting
oxidation reaction
what are the products of rusting
hydrated iron (III) oxide
how can you prevent rusting
-coating with plastic/ oiling
-placing a more reactive metal with the iron
what are the properties of iron
-malleable so is used to make gates and railings
-corrodes easily
what are the properties of copper
-conductor of heat and electricity
-used in wiring
-used in heating systems and underfloor heating
what are the properties of aluminium
-doesnt corrode
-less dense than iron
-reacts quickly with oxygen in the air
