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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Turk on September 22, 2011, 08:47:34 AM

Title: procedural question of Na2Co3 in an unknown salt mixture
Post by: Turk on September 22, 2011, 08:47:34 AM

So i had my lab period and i was instructed to use methyl orange as my indicator. I did titrate the first time and came up with roughly 34% na2co3 in the unknown.

However, i was running out of lab time, so what i did was massed 3 samples into EM flasks, added amount of HCl it would need for 34%+12mL excess. After that i boiled it and rinsed the contents on the watch glass back into the EM flask. However, after that i didn't have time to titrate them, so i put foil on the flask and taped it around to sort of seal it, and i know the contents remaining in the EM flask is 2NaCl and Excess HCl, both of which do not react with CO2 (which i boiled out anyway). Can i proceed this way or do i have to create 3 new samples.

Title: Re: procedural question of Na2Co3 in an unknown salt mixture
Post by: Dan on September 22, 2011, 12:43:23 PM

Quote from: Turk on September 22, 2011, 08:47:34 AM

Can i proceed this way or do i have to create 3 new samples.

Proceed with what? Can you explain the experiment clearly?