Flashcards
chemistry as level topic 4 - , group 1 and 2
Flashcards do conjunto (14)
- 1what happens when group 2 elements react with waterthey produce a metal hydroxide [(OH)2]and hydrogen
- 2what happens when group 2 elements react with oxygenthey produce a solid white oxide
- 3what happens when group 2 elements react with chlorinethey produce a solid white chloride
- 4how do oxides and hydroxides react with wateroxides form hydroxides
hydroxides form the same hydroxide (no change) - 5how do oxides and hydroxides react with dilute acidboth oxides and hydroxides form a metal chloride and water
- 6what are solubility trends down group 2for sulphates, solubility increases going UP
for hydroxides, solubility increases DOWN - 7what is thermal stabilityhow much heat it takes to break something down. higher thermal stability means more energy needed
- 8what are thermal stability trends down a groupdown a group, elements get more thermally stable. this is because they are larger, so the charge is more spread out, causing less distortion
- 9how thermally stable is group 2much less than group 1. this is because they have a higher charge (2+) so cause more distortion
- 10describe how group 1 carbonates and nitrates decomposegroup 1 carbonates don't decompose, they are to thermally stable.
group 1 nitrates decompose to form a nitrate and oxygen. - 11describe how group 2 carbonates and nitrates decomposegroup 2 carbonate decompose to form an oxide and carbon dioxide. group 2 nitrates decompose to form an oxide, nitrogen dioxide and oxygen
- 12how can we test for thermal stability (in nitrates and carbonates)see how long it takes for the carbonate to form CO2 (add it to limewater to tell). and see how long it takes for the nitrate to form oxygen (try to relight a splint)
- 13what are the fame tests for group 1 and 2little children stand yelling potatoes potatoes come read bible of god.
lithium crimson sodium yellow potassium purple calcium red barium green - 14what is the explanation for flame test coloursas energy is absorbed from the flame, electrons move to higher energy levels. as they fall back down, light is releases. the colours are determine by how far they fall.
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- Descrição
- chemistry as level topic 4 - halogens, group 1 and 2
- Criado por
- Talya Hambling
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