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Chemistry GCSE C2 + C3 Game

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Original post by aj345
it forms (sodium) hydroxide and hydrogen


Yay! 1 mark to you
Original post by aj345
ways to remove hardness in water


1.Ion exchange resin
2. Sodium/hydrogen ions

1. Sodium carbonate
Reply 22
Original post by ProbablyJade
1.Ion exchange resin
2. Sodium/hydrogen ions

1. Sodium carbonate


please may i have the equations
What's meant by a weak metal... poor poor Tony Stark?

I can't say i can expand upon them being lighter and weak. Such as aluminium and gold.

C2 - Give a reason why science can't answer "should caffeine be included in drinks" by itself
Original post by aj345
please may i have the equations


Sodium ions switch with calcium and magnesium ion

Sodium/hydrogen carbonate thermally decomposes to form carbonates which react to form calcium and magnesium carbonates which are precipitates that settle out of the water
Reply 25
Original post by WillsWheels
What's meant by a weak metal... poor poor Tony Stark?

I can't say i can expand upon them being lighter and weak. Such as aluminium and gold.

C2 - Give a reason why science can't answer "should caffeine be included in drinks" by itself


based on diet and opinion mate
Original post by WillsWheels
What's meant by a weak metal... poor poor Tony Stark?

I can't say i can expand upon them being lighter and weak. Such as aluminium and gold.

C2 - Give a reason why science can't answer "should caffeine be included in drinks" by itself


1. It is up to the consumer
2. It is a drug


I hate these questions i never know what to answer?
Original post by aj345
ways to remove hardness in water


Distill the water by boiling it - if it's temporary hard water.Pass it through an ion exchange column for either temporary or permanently hard water.
Reply 28
what are the stages of water treatment (4 Marks)
Original post by ProbablyJade
1. It is up to the consumer
2. It is a drug


I hate these questions i never know what to answer?


Don't Worry
Remember how scociety works:
1. Politics/Social Issues - Think of Dave and Boris - just don't write that.
2. Scientist can't experiment on if caffeine should be in a drink.
Original post by WillsWheels
Don't Worry
Remember how scociety works:
1. Politics/Social Issues - Think of Dave and Boris - just don't write that.
2. Scientist can't experiment on if caffeine should be in a drink.


But the personal life choice is correct
1/2 marks :wink:
Okay guys - Why shouldn't Sean - this crazy student - react potassium with sulfuric acid.
Original post by aj345
what are the stages of water treatment (4 Marks)


Metal Gauze collects debris

Solution added to make microbes and solids stick together and fall tot he bottom of the water.

Passed through gravel to collect these solids.

Chlorine and sometimes fluorine is added. Chlorine kills harmful microbes and fluorine helps protect against tooth decay.
Reply 33
How does boiling temporary hard water soften it?


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Original post by Mahrez
more energy required to break boinds than to form bonds (c3 def)


Be careful.

More energy needed to break existing bonds than is RELEASED forming new bonds.
Original post by WillsWheels
Okay guys - Why shouldn't Sean - this crazy student - react potassium with sulfuric acid.


Potassium is too reactive (alkali metal) so it's dangerous
Reply 36
Original post by FutureDietitian
Be careful.

More energy needed to break existing bonds than is RELEASED forming new bonds.


thats exactly what I said?
Original post by z1820
How does boiling temporary hard water soften it?


Posted from TSR Mobile


Hydrogen carbonate ions break down, forming lime scale
Original post by Mahrez
thats exactly what I said?


The way you said it implied you input energy to form new bonds. You must contrast the "energy needed" with the "energy released" :smile:
Lets Hit the Big 40 posts. Hmmm...

Explain why graphite can conduct electricity.

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