help on chemistry crousework!!!!

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Shushi
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#1
Report Thread starter 17 years ago
#1
is anyone doing "hydrochloric acid and sodium thiosulphate"? i don't know what to write in the introduction! please help
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chrisbphd
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#2
Report 17 years ago
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What are you doing with them? That title could give rise to a whole host of experiments!

For all we know you could be doing something about the relative masses of them or some horrid analysis.

Perhaps you should put what you plan to achieve with these two chemicals in the introduction, otherwise I can't see you scoring more than 0.
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cobra
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#3
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Is it the lost cross
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Mystic
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#4
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Is it the coursework where you use the Sodium Thiosulphate in a burette and mix with Potassium Iodate....for a titration...?
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wattyinparis
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#5
Report 17 years ago
#5
its the cross test 1.
im doin it as well. gcse cw
u hav 2 study the rate of reaction wen sodium thiosulphate and HCl are mixed. im usin concentration as a variable.
is 1/time directly proportional to concentration?
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Hawk
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#6
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ah yes I faguely rember this from last year.

Where you vary conc. and see how quickly the cross disappears each time.

As conc. increases, more molecules are present and so they collide and react quicker.
SO the cross should disappear sooner. Therefore as concentration increases time decrreases, and if you have a straight line graph, which if i rember correctly you should,

then yes 1/time is directly proportional to concentration.

I think this is right but not 100% sure
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Hawk
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#7
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#7
..
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