Chemistry Unit 1

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  • Created by: canunot
  • Created on: 09-06-14 22:42
compounds
formed when metals and non metals consist of ions
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limestone
composed of the compound calcium carbonate
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what can calcium carbonate be decomposed by?
thermal decomposition
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what does calcium oxide react with
water
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what reacts with carbon dioxide to produce calcium carbonate
calcium hydroxide
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phytomining
using plants, absorb metal compounds when the grow. burned to produce ash
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bioleaching
using bacteria, separating the metal from its ore. dis, very slow
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electrolysis
positive ions move towards negative.
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crude oil
mixture of large compounds
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thermal decomposition
breaking down by heating
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ore
rock containing a metal compound that can be extracted the metal
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reduction
reaction takes place as carbon removes the oxygen from the oxide to produce the metal
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why steel is better than pure iron
easily shaped, high-carbon steels and resist corrosion
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what do aluminium and titanium both have
resist corrosion, low density
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3 properties of alloys
good conductors, keep their shape, buildings
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how does distillation
done by steps by heating the mixture to different temperatures
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how does fractional distillation
done by continuously by vaporising the mixture and condensing the fractions at diferent
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incomplete combustion that causes global dimming
carbon monoxide
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what do burning hydrocarbons produce
co2 and water
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2 ways hydrocarbon can be broken down
heating a mixure of hydrocarbon vapours & steam to a very high temp // passing hydrocarbon vapours over a hot catalyst
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alkenes have a ______ bond. React with
double / bromine water turning it orange > colourless
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polymers
large molecules made when monomers join together
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what is a shape memory polymer
uses temperature of the body to make the thread tighten and close the wound
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2 ways ethanol can be made
fermenting sugar using enzymes in yeast // made by hydration of ethene with steam in presence of catalyst
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how can vegetable oils be extracted
distillation // by seeds or nuts
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how can vegetable oils be hardened
reacting with hydrogen with a nickel catalyst at 60'c
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what do emulsifiers stop
oil and water from separating layers
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why do tectonic plates move
because convection currents in the mantle that are caused by radioactive decay
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why was wegeners idea not accepted
because he could explain why continents move
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gases the earth had in its past
co2, nitrogen, methane, ammonia
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what increased oxygen in atmosphere
plants increased, decreasing co2
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what was the miller-urey experiment
they found that amino acids, building blocks for proteins had been used
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2 processes carbon dioxide is released into the atmosphere & remove
plants, fossil fuels // water, ocean
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Other cards in this set

Card 2

Front

limestone

Back

composed of the compound calcium carbonate

Card 3

Front

what can calcium carbonate be decomposed by?

Back

Preview of the front of card 3

Card 4

Front

what does calcium oxide react with

Back

Preview of the front of card 4

Card 5

Front

what reacts with carbon dioxide to produce calcium carbonate

Back

Preview of the front of card 5
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