chemistry as level topic 4 - , group 1 and 2

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chemistry as level topic 4 - halogens, group 1 and 2
Talya Hambling
FlashCards por Talya Hambling, atualizado more than 1 year ago
Talya Hambling
Criado por Talya Hambling quase 9 anos atrás
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Resumo de Recurso

Questão Responda
what happens when group 2 elements react with water they produce a metal hydroxide [(OH)2]and hydrogen
what happens when group 2 elements react with oxygen they produce a solid white oxide
what happens when group 2 elements react with chlorine they produce a solid white chloride
how do oxides and hydroxides react with water oxides form hydroxides hydroxides form the same hydroxide (no change)
how do oxides and hydroxides react with dilute acid both oxides and hydroxides form a metal chloride and water
what are solubility trends down group 2 for sulphates, solubility increases going UP for hydroxides, solubility increases DOWN
what is thermal stability how much heat it takes to break something down. higher thermal stability means more energy needed
what are thermal stability trends down a group down a group, elements get more thermally stable. this is because they are larger, so the charge is more spread out, causing less distortion
how thermally stable is group 2 much less than group 1. this is because they have a higher charge (2+) so cause more distortion
describe how group 1 carbonates and nitrates decompose group 1 carbonates don't decompose, they are to thermally stable. group 1 nitrates decompose to form a nitrate and oxygen.
describe how group 2 carbonates and nitrates decompose group 2 carbonate decompose to form an oxide and carbon dioxide. group 2 nitrates decompose to form an oxide, nitrogen dioxide and oxygen
how 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)
what are the fame tests for group 1 and 2 little children stand yelling potatoes potatoes come read bible of god. lithium crimson sodium yellow potassium purple calcium red barium green
what is the explanation for flame test colours as 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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