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level: air and water

Questions and Answers List

level questions: air and water

QuestionAnswer
testing for waterCopper (II) sulphate: Anhydrous or ‘dehydrated’ (and pure) copper (II) sulphate is white. When water is present in anhydrous copper(II) sulphate it turns blue, becoming hydrous copper (II) sulphate
testing for waterCobalt (II) chloride: Anhydrous or ‘dehydrated’ (and pure) cobalt (II) chloride is blue. When water is present in anhydrous cobalt (II) chloride it turns pink, becoming hydrous cobalt (II) chloride.
purifying waterFiltration: The different sized insoluble particles are filtered out of the water using filters
purifying waterChlorination: Chlorine is injected into the water and it sterilises it, killing the microbes
percentages of the things in clean air78% nitrogen, 21% oxygen and small quantities of noble gases, water vapour and carbon dioxide.
what are the common pollutants in aircarbon monoxide, sulphur dioxide and nitrogen oxides
where does carbon monoxide come fromincomplete combustion of carbon-containing substances,
why is carbon monoxide badcarbon monoxide poising : causes breathing problems as it reduces the amount of red blood cells in the body
where does sulphur dioxide come fromcombustion of fossil fuels which contain sulphur compounds
what does sulphur dioxide lead tolead to acid rain which corrodes metal, erodes stone work and can kill plants and aquatic life.
whre does nitrogen oxides come fromcar engines
what does nitrogen oxide potentially lead toreact with other pollutants to form smog which causes difficulty in breathing. It also causes acid rain.
what can a catalyic converter do (for the bad stuff)used to remove nitrogen monoxide and carbon monoxide from exhaust emissions through the reaction over a hot catalyst.
what can be carbon monoxide be oxidied tobecome carbon dioxide. 2CO + O2 → 2CO2
what can nitrogen monoxide be reduced tonitrogen and oxygen. 2NO → N2 + O2
conditions for rusting of iron.The presence of oxygen and water vapour in air
how can rusting be stoppedby encasing the metal with paint, oil, grease or coating with plastic
how can rusting be stoppedsacrificial protection, implementing the reactivity scale
examples of sacrificial protectioniron can be coated (galvanised) with zinc as zinc is more reactive than iron, and it oxidises more readily than the iron. After the sacrificial metal has been corroded then it can be replaced.
how can be carbon dioxide get formedas a product of complete combustion of carbon-containing substances
how can be carbon dioxide get formedas a product of respiration
how can be carbon dioxide get formedas a product of the reaction between an acid and a carbonate
how can be carbon dioxide get formedas a product of thermal decomposition of calcium carbonate
what type of gas is carbon dioxide and methanegreenhouse gases
what is nitrogen, phosphurus and potassium needed forfertilisers as they provide the mineral ions required for healthy growth in plants
fertlisers must besoluble in water so that the root hair cells in the plants can absorb the ions.
how do we create ammoniahabor process, reversible reaction
factors of ammonia450 degrees
factors of ammonia200 atmopheres
factors of ammoniairon catalyst
process (picture) of habor processhere