extracting metals and equilibria Flashcards
what is oxidation
this is the gain in oxygen and the loss in electrons
what is reduction
this is the loss in oxygen and the gain in electrons
is combustion a exothermic or an endothermic reaction?
exothermic
how do you remember the reactivity series
Please potassium
stop sodium
calling calcium
me magnesium
a aluminium
careless carbon
zebra zinc
instead iron
try tin
learning lead
how hydrogen
copper copper
saved silver
gold gold
when does a displacement reaction happen
when a more reactive metal reacts with a less reactive one
when will metals get extracted using carbon
if the metal is less reactive than carbon
when will metals get extracted using electrolysis
if it is more reactive than carbon
what is bioleaching
this is process of extracting metals using bacteria
how does the process of bioleaching occur
this uses bacteria. this bacteria gets energy from the bonds between the atoms in the ore so, it will separate out the metal from the ore
what is phytoextraction
this is the process of extracting metals using plants
how does the process of phytoextraction occur
plants are grown in the soil that contains metal compounds. these will get absorbed by the plants. the plant will then get burned into ash to then extract the metal compounds
how does recycling help the environment
this will cut down the amount of rubbish that gets sent to landfill. landfill takes up space and pollutes surroundings.
how does recycling have economical benefits
-less need to extract metals
-creates jobs
what are the 4 different stages of the life cycle assessments
extraction
manufacture
product use
disposal
how does each stage of the life cycle assessment have an environmental impact
extraction: materials often come from crude oil which generates pollution. extraction of metals also causes a lot of pollution
manufacture: this can cause lots of pollution
product use: this can damage the environment
disposal: they can be disposed at landfill site. this can takes up space and can pollute land and water.
