58 938
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Inorganic Chemistry Question for Bob

Question #20398
How might you determine the concentration of a strong acid using a standard potassium thiosulfate solution, potassium iodide, and a standardized solution of sodium thiosulfate?
Expert's answer
Thisis example of Redox Titration and connection between the reactantsis below
A standard reaction is as follows:
Acid and potassium iodide are added to a solution of potassium iodate getting the following reaction:
KIO3 + 5KI + 3H2SO4 = 3I2 + 3K2SO4 + 3H2O
represented by the following ionic equation:
IO3- + 5I- + 6H+ = 3I2 + 3H2O
Thiosulpathe is titrated against this solution (effectively against iodine):
I2 + 2Na2S2O3 = Na2S4O6 + 2NaI
represented by the following ionic equation:
I2 + 2S2O32- = S4O62- + 2I-
where the dark brown coloured solution of iodine turns pale yellow and finally colourless as the reaction proceeds (starch is used as indicator after the pale yellow transition forming a black solution due to an iodine-starch complex which turns colourless upon further addition of thiosulphate).

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question