Further Chemistry

WHY DO GROUP 1 ELEMENTS GET MORE REACTIVE AS YOU GO DOWN THE GROUP?
There's an increased atomic radius meaning there's more electron shielding. Therefore there are weaker electrostatic forces of attraction making it easier to lose electrons.
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GIVE THREE PROPERTIES OF TRANSITION ELEMENTS
Good conductors (heat and electricity), dense, strong, hard, shiny, high melting points (other than mercury) and rarely react with water or oxygen.
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HOW CAN CARBONATES BE IDENTIFIED?
Add hydrochloric acid and pass gas produced through limewater. If CO2 is present then it will go cloudy.
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DESCRIBE THE BEST CONDITIONS NEEDED IN THE HABAR PROCESS
Temperature 450 degrees (low temps better but rate too slow), pressure 200 atm (greater pressures are better but stronger vessel is needed which is expensive) and iron catalyst (increases the rate of reaction)
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WHEN IS EQUILIBRIUM REACHED?
When both the forward and backward reactions are equal as its a closed system.
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HOW CAN SULPHATE IONS BE IDENTIFIED?
Dissolve the sample in dilute hydrochloric acid and barium chloride solution is added. If a white precipitate forms sulphate ions are in the sample.
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NAME THE FLAME COLOURS FOR THE FOLLOWING ELEMENTS:LITHIUM, SODIUM, POTASSIUM, CALCIUM AND BARIUM
Crimson, yellow/orange, lilac, (brick) red, green
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WHAT IS THE DIFFERENCE BETWEEN SCALE AND SCUM?
When hard water is boiled calcium carbonate forms which is scale. Whereas scum forms when hard water reacts with soap.
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Other cards in this set

Card 2

Front

GIVE THREE PROPERTIES OF TRANSITION ELEMENTS

Back

Good conductors (heat and electricity), dense, strong, hard, shiny, high melting points (other than mercury) and rarely react with water or oxygen.

Card 3

Front

HOW CAN CARBONATES BE IDENTIFIED?

Back

Preview of the front of card 3

Card 4

Front

DESCRIBE THE BEST CONDITIONS NEEDED IN THE HABAR PROCESS

Back

Preview of the front of card 4

Card 5

Front

WHEN IS EQUILIBRIUM REACHED?

Back

Preview of the front of card 5
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