chem of the environment Flashcards
(23 cards)
tests for water
- anhydrous cobalt (ii) chloride
- anhydrous copper (ii) sulfate
test purity of water
check melting + boiling point
distilled water used because
because less impurities compared to tap water
useful stuff in water from natural sources
- dissolved oxygen for aquatic life
- some metal compounds essential for life
harmful stuff in natural water
- plastics harm aquatic life
- some metal compounds bad
- sewage has disease causing microbes
- nitrates + phosphates cause deoxygenation
water treatment
1) sedimentation + filtration to remove insoluble solids
2) carbon to remove tastes + odours
3) chlorination to kill microbes
fertilisers
ammonium salts + nitrates
fertilisers should have
N.P.K for improved growth
nitrogen in air
78%
oxygen in air
21%
rest of air
noble gases + CO2
carbon dioxide
- complete combustion of C-based fuels
- increased global warming so climate change
carbon monoxide
- incomplete combustion of C-based fuels
- toxic gas
particulates
respiratory issues
methane
- decomposition of vegetation + digestion waste gases
- increased global warming so climate change
oxides of nitrogen
- car engines
- acid rain + photochemical smog + respiratory issues
sulfur dioxide
- combustion of sulfur based fossil fuels
- acid rain
how global warming
- absorption + reflection + emission of thermal energy
- reduces thermal energy loss to space
solve climate change
- plant trees
- reduce livestock farming
- decrease fossil fuel use
- use hydrogen + renewable
solve acid rain
- catalytic converter
- decrease sulfur fuel burning to reduce SO2
- flue gas desulfurisation
photosynthesis
reaction between carbon dioxide and water to produce glucose + oxygen in the presence of chlorophyll + using energy from light
how oxides of nitrogen
nitrogen + oxygen react in engines at high temp
catalytic converter
2NO(g) + 2CO(g) → N₂(g) + 2CO₂(g)
