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Topic: IB Chemistry Extended Essay - Solubility of Aspirin  (Read 2633 times)

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Offline Antxak

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IB Chemistry Extended Essay - Solubility of Aspirin
« on: February 12, 2018, 06:27:15 AM »
Greetings, I'm here for help in writing my EE. The topic is solubility of aspirin in different drinks; I primarily chose water, coke, black and green tea and beer for the experiment as they belong to the most commonyl drunk drinks worldwide.
I decided to use conductometry as the analytical method, as it is much more accurate than titration or recrystallisation.
I need help with deducing aspirin concentrations from the conductometry readings. My method is that I measure the conductivity of a drink before dissolving aspirin and after (I use macerated aspirin tablets). The theory is that the conductance will raise, but is it possible to calculate the actual concentration of the created solution by seeing how much the conductance changed in each case?
I did see some equations that involve properties such as the mobility of ions, but is this method correct when dealing with such a wide mixture of chemicals that are for example in coke?

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