Required Practical 7a - The Iodine Clock Reaction

[@annchinnery4110]

Finally, a teacher that does a decent walk-through of an experiment I can follow and understand each step- cant thank you enough!

[@Sugarleena123]

Thanks so much Mr Rayner you are a great teacher at school!

[@Slugzie]

This video is a lifesaver !

[@ar-mo7xc]

You saved my life

[@dft163]

Written on the table!

[@hk-yf1pg]

Sir your just the best

[@isaacosaretin1]

Thank you for all the helpful work Rayner-sensei🙏🏾

[@humayrakadir5853]

sir you are such a good teacher i wish u had more alevel videos, were they only for lockdown?

[@SensibleQuotes632]

what are the concentrations/molarities of each solutions in this video?

[@crrchem4419]

0.25 Sulphuric Acid
0.10 Potassium Iodide
0.05 Sodium Thiosulphate
0.10 Hydrogen Peroxide

[@darshanapatil9175]

This is very useful.
Is there any literature value for this experiment

[@davidmkwizu76]

And also double check your total volume.

[@shahindaabbas2241]

total volume should be 66 cm3

[@humayrakadir5853]

It is its 56 before hydrogen peroxide added and then 10 cm cubed of h202 added as final reactant

[@Rainecaine]

I'm gonna stick with 66cm3 tbh, sounds more solid and makes sense in my head

[@katheriner6456]

25cm3 of H2SO4 + 5cm3 of KI + 5cm3 of Na2S2O3 + 1cm3 of starch + 20cm3 of H2O = 56 cm3

[@davidmkwizu76]

Great but shouldn’t you be swirling the test tube with a glass rod.

[@estellem1218]

How did you add up the volume to be 56cm3

[@ninjadog5800]

would we be able to call this a chain reaction

[@elenionwuachi]

so so helpful!!!!!!

[@subhajitrajak2466]

How To calculate activation energy from clock reaction please reply fast 😢😢😢😢

[@lockwrath2777]

Does this experiment use dilute or conc sulphuric acid, need to know for risk assessment

[@crrchem4419]

Dilute, it's only needed to acidify the Peroxide

[@donaldthegreat5809]

subbed

[@nadaadd7093]

What kind of starch is this?

[@stalagaictie]

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