Karteikarten
Topic 1&2 Chemistry
Karten in diesem Stapel (20)
- 1what is a precipitate?An insoluble product
- 2what does a number in front of a formula apply to? Ca + H2O --> Ca(OH)2 + H2how much of that atom/ element (what ever you wanna say) there is
- 3what is the state symbol for 'dissolved in water''aq'
- 4Name the two main gases in the earth's atmosphere todayoxygen and nitrogen
- 5Explain how today's atmosphere is different from today's atmosphereMain gases today are oxygen and nitrogen, main gases then were carbon dioxide and water vapour
- 6How were the oceans formed?The water vapour condensed as the earth cooled to form the oceans
- 7List 3 ways which human activity is changing the atmosphere1. burning fossil fuels
2. livestock farming
3. deforestation - 8Apart from humans, what else is changing the atmospherevolcanic activity
- 9How could you investigate the proportion of oxygen in the air?2 syringes, 1 tube, copper heated, air in tubes, oxygen taken up by copper forming copper oxide. make marks on syringes to see proportion of air
- 10what are the three main types of rocksedimentary, igneous, metamorphic
- 11what type of rock is marble?metamorphic
- 12How is marble formedUnder enormous amounts of pressure and heat - limestone or chalk.
- 13what type of rock is chalkSedimentary
- 14What is the difference in the way that extrusive and intrusive rocks form?Extrusive = cools quickly ABOVE ground, small crystals(e.g basalt and rhyolite)
Intrusive = cool slowly UNDER ground, large crystals,(e.g granite, gabbro) - 15What is thermal decomposition?The breaking down using heat
- 16Write down (word equation for taylor) Symbol equation for the thermal decomposition of limestone.calcium carbonate --> calcium oxide + carbon dioxide
CaCO3 --> CaO + CO2 - 17how could you test for carbon dioxide in a thermal decomposition reactionBubble the gas through limewater (calcium hydroxide), if gas turns milky/cloudy... CO2 is your gas BABY!
- 18What product is made by adding water to calcium oxide.... why is it useful?calcium hydroxide - (a base is a metal hydroxide... :))
It neutralises acidic fields!! - 19Are atoms lost or just rearranged?JUST rearranged.... (like me)
- 20How well did you do?AWFUL!
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- A Level Science Karteikarten am Topic 1&2 Chemistry, erstellt von Chloeby am 20/05/2013.
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- Chloeby
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