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Question about IA

Good afternoon.
I have a question which is quite simple.
I am supposed to do my Chemistry IA on iodine clock reaction and then find the rate of reaction and other interesting things.

However, I did the following reaction:
KI + H2O2 + H2SO4 -> K2SO4 + I2 + H2O
and I varied the concentrations of KI, H2O2 and H2SO4

Is this an iodine clock reaction?
And if not, what can I do with what I have?

Thank you in advance.
Original post by Sofya
Good afternoon.
I have a question which is quite simple.
I am supposed to do my Chemistry IA on iodine clock reaction and then find the rate of reaction and other interesting things.

However, I did the following reaction:
KI + H2O2 + H2SO4 -> K2SO4 + I2 + H2O
and I varied the concentrations of KI, H2O2 and H2SO4

Is this an iodine clock reaction?
And if not, what can I do with what I have?

Thank you in advance.


It is one of the reactions in an iodine clock, but not a clock. You will get steady formation of iodine as the reaction proceeds.
Reply 2
Original post by charco
It is one of the reactions in an iodine clock, but not a clock. You will get steady formation of iodine as the reaction proceeds.


I was so afraid of this...
Do you think there's anything I can do with the information I have?
I varied the concentrations a little bit, but now, when I finally understood that I was following the wrong path... Well, I am confused.
Original post by Sofya
I was so afraid of this...
Do you think there's anything I can do with the information I have?
I varied the concentrations a little bit, but now, when I finally understood that I was following the wrong path... Well, I am confused.


What did you actually measure?
Reply 4
Original post by charco
What did you actually measure?


I measures how much time it takes for the colour to become so deep that I can no longer see the picture which is put under a beaker in which I pour the solutions.

I apologize for being so vague before, I was just so nervous :s-smilie:
Original post by Sofya
I measures how much time it takes for the colour to become so deep that I can no longer see the picture which is put under a beaker in which I pour the solutions.

I apologize for being so vague before, I was just so nervous :s-smilie:


Did you use starch as an indicator of the iodine?
Reply 6
Original post by charco
Did you use starch as an indicator of the iodine?


No...
But it still changed colour
Original post by Sofya
No...
But it still changed colour


of course, but iodine colour (yellow --> orange --> red) is not as obvious as the starch-iodine complex dark blue/black

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