Group 2

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  • Created by: Kate
  • Created on: 06-04-14 20:52
State the solubility trend for Group 2 hydroxides
Solubility increases down group 2. (BaSH - barium soluble hydroxide)
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State the solubility trend for Group 2 sulphates
Solubility decreases down group 2. (MgSS - magnesium soluble sulphates)
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State and Explain the trend in melting/boiling points for Group 2
Melting/Boiling point decreases down group 2. This is because there is a weaker nuclear attraction between the positive metal ions (cations) and delocalised electrons.
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State the trend in atomic radius for Group 2
Atomic radius increases down group 2. This is because as you go down you get another layer of electrons and more shielding meaning a weaker nuclear attraction, so the atom is held less closely together
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State the trend in 1st Ionisation Energy for Group 2
Ionisation energy increases down Group 2. This is because you get an extray layer of electrons and more shielding so there is a weaker nuclear attraction, meaning the outermost electron is more easily lost
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State the trend of Group 2 reactivity with water
Reactivity with water increases down group 2. This is because of the extra layer of electrons, more shielding, resulting is a weaker nuclear attraction, meaning the outermost electron is more easily lost and a reaction occurs more easily.
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Write an equation for the reaction between Magnesium and Water and Barium Water. REMEMBER STATE SYMBOLS.
Mg(s) + 2H2O(g) ---> Mg(OH)2 + H2(g) / Ba(s) + 2H2O(l) ---> Ba(OH)2(aq) + H2(g)
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Describe the test for Sulphate Ions
(1) Add Hydrochloric acid (2) Add Barium Chloride (3) if Sulphate Ions are present; a white precipitate of Barium Sulphate will form
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What is the purpose of adding hydrochloric acid in the test for sulphate ions?
It removes any other ions that may affect the results by forming a precipitate (eg carbonate ions)
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Other cards in this set

Card 2

Front

State the solubility trend for Group 2 sulphates

Back

Solubility decreases down group 2. (MgSS - magnesium soluble sulphates)

Card 3

Front

State and Explain the trend in melting/boiling points for Group 2

Back

Preview of the front of card 3

Card 4

Front

State the trend in atomic radius for Group 2

Back

Preview of the front of card 4

Card 5

Front

State the trend in 1st Ionisation Energy for Group 2

Back

Preview of the front of card 5
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