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Data Logging Procedure As Extension For Sodium Thiosulphate And Hydrochloric Acid Reaction

Asked by habithouse | Mar 2, 2007 | GCSE Level > Chemistry > Coursework
habithouse
habithouse asks:

I am doing my coursework on 'Factors affecting the rate of reaction between sodium thiosulphate and hydrchloric acid'. I chose to vary the concentration of sodium thiosulphate using the paper with a cross that disappears method. For my extension i have to describe another method of measuring the rate of reaction and my teacher suggesting a data logging procedure using a light reciever. I was wondering if you could enlighten me as to the method of using this pricedure with this reaction as i have searched through my school books and the internet extensively and have been unable to find anything relevant. Thankyou(:
.xoxo

etutor answers:
The reaction results in the production of sulphur, making the solution cloudy. If you shine a light through the tube of solution and have a light sensor on the other side, this will pick up the drop in light transmission as the solution goes cloudy. There is a special instrument (a colorimeter) which incorporates both a light souirce and a light sensor, and so can do this automatically.

1 student responses

blossom24
blossom24
what is the difference between colorimeter and SPECTROPHOTOMETER?
responded Feb 18, 2008 6:55:22 PM GMT
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Johanna
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