Alkaine Earth Metals Group.2

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  • Created by: amerie
  • Created on: 08-04-15 08:36
How many electrons do group 2 elements lose when they react?
2 electrons to become 2+ ion
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Which of the 1st five group 2 element is the most reactive and why?
Barium, the reactivity increases down the group because of the increase in atomic radius and shielding, making it easier to remove the outermost electron as it feels less of the positive charge from the nucleus
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Describe the trend in ionisation energy down group two?
It decreases down the group
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Describe and explain the trend in melting points down group two?
Melting point decreases down the group. They all have a metallic bonding structure meaning that the charge of the delocalised electrons from the outermost shell is constant, however the mass is increasing so the charge density and attractions decreas
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What are the products when a group 2 metal reacts with water?
A metal hydroxide and hydrogen
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Write the ionic equation for Calcium in its reaction with water?
Ca = Ca2+ + 2e
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Write the equation for Barium reacting with water?
Ba + 2H2O = Ba(OH)2 + H2
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Write the equation for Magnesium's reaction with steam?
Mg + H2O = MgO + H2
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Is Magnesium the most or least reactive?
least
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Describe the solubility of hydroxide ions down group two?
It increases down the group
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Is magnessium hydroxide more or less soluble than Strontium hydroxide
Magnessium hydroxide is more soluble than strontium hydroxide
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Which is the name and colour of the precipitate formed when sulphuric acid is added to compound containing calcium ions?
faint white calcium sulphate is formed
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What is Calcium hydroxide commonly used for?
Calcium hydroxide is commonly known as slake lime and is used to neutralize acidic soil.
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Why is HCl added in the test for barium ions?
To remove any unwanted ions?
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Does the solubility of sulphates increase or decrease down group 2?
decrease
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Show the ionic equation for the reaction between sulphuric acid and Ba2+ ions?
Ba2+ + SO42- = BaSO4 which is a thick white percipitate
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Barium Meal is toxic why is it used in the human body?
Barium sulfate is insoluble so it does not get absorbed into the body and only passes through
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Other cards in this set

Card 2

Front

Which of the 1st five group 2 element is the most reactive and why?

Back

Barium, the reactivity increases down the group because of the increase in atomic radius and shielding, making it easier to remove the outermost electron as it feels less of the positive charge from the nucleus

Card 3

Front

Describe the trend in ionisation energy down group two?

Back

Preview of the front of card 3

Card 4

Front

Describe and explain the trend in melting points down group two?

Back

Preview of the front of card 4

Card 5

Front

What are the products when a group 2 metal reacts with water?

Back

Preview of the front of card 5
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