C3a
- Created by: anniedarlington
- Created on: 30-03-15 12:47
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- C3a
- periodic table
- newlands and mendeleev both arranged by atomic mass
- called the periodic table as when the elements are arranged a periodic pattern in their properties can be seen
- hardness of water
- build up of scale makes equipment less efficient
- benefits of hard water = nutritious (calcium) and reduced risk of heart disease
- ion exchange column: lots of Na or H ions which are exchanged for Ca or Mg ions, removing them from the water
- water quality
- water passes through mesh, chemicals added to make solids and microbes stick together and fall to bottom, water filtered, chlorine added
- fluoride added as it prevents tooth decay, chlorine added as it prevents disease
- chlorine taste can be removed using a water filterer containing carbon
- lots of fluoride = cancer risk and bone probs
- chlorine can react with natural substances in water to form toxic by-products
- haber process
- nitrogen sourced from air and hydrogen sourced from natural gas
- alcohols - OH
- ethanol can be combined with petrol and used as a fuel, more ethanol = less pollution, fermentation of plants, renewable
- dyes can be added to stop people drinking alcohols
- meths = fuels and cleaning brushes
- carboxylic acids
- ethanoic acid made by oxidising ethanol using microbes or oxidising agents
- acids form a weak acidic solution in water as they dont ionise completely so not many H+ ions are released
- ethanoic acid made by oxidising ethanol using microbes or oxidising agents
- esters
- ethanol + carboxylic acid = ethyl ethanoate, catalyst = concetrated sulfuric acid
- periodic table
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