REDOX TITRATION QUESTION HELP!! Chemistry

Watch
Rxmxi
Badges: 11
Rep:
?
#1
Report Thread starter 3 years ago
#1
1. A mass of 0.1500g of potassium iodate(V), KIO3, was dissolved in distilled water and made up to 250cm3 of solution. 25.00cm3 of this solution was added to excess aqueous potassium iodide and aqueous acid. The equation for this redox reaction is:

IO3-(aq) + 6H+(aq) + 5I-(aq) → 3I2(aq) + 3H2O(l)

The liberated iodine was then titrated against sodium thiosulfate, using starch indicator. The redox ionic equation for the reaction taking place in the titration is:
2S2O32-(aq) + I2(aq) → 2I-(aq) + S4O62-(aq)

The liberated iodine just reacted with 22.60cm3 of aqueous sodium thiosulfate

a) Calculate the concentration of the potassium iodate(V) solution, in moldm-3.

I got 2.8 x10^-3 moldm^-3

b) Calculate the concentration of the aqueous sodium thiosulfate, in moldm-3.


I got 6.20X10^-3 moldm^-3
Is part b correct???
Thank you in advance!
0
reply
hassanHali
Badges: 4
Rep:
?
#2
Report 3 years ago
#2
I got 6.2 x 10^-2 moldm-3 not 10^-3
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

What support do you need with your UCAS application?

I need help researching unis (21)
13.73%
I need help researching courses (8)
5.23%
I need help with filling out the application form (8)
5.23%
I need help with my personal statement (65)
42.48%
I need help with understanding how to make my application stand out (36)
23.53%
I need help with something else (let us know in the thread!) (3)
1.96%
I'm feeling confident about my application and don't need any help at the moment (12)
7.84%

Watched Threads

View All