Adv higher chemistry project

I’m doing the calcium content in milk for my project and I have no idea what to do next and what procedures I’m using. Has anyone else done this project that can help?

Reply 1

TypicalNerd

Original post by Evle_13

I’m doing the calcium content in milk for my project and I have no idea what to do next and what procedures I’m using. Has anyone else done this project that can help?

Whilst I personally haven’t done it, I would probably suggest doing a complexometric titration, if you can.

Essentially it would be a titration against EDTA with eriochrome black T indicator where the solution is buffered to maintain a pH of around 10. You would of course need to dilute down the milk sample to ensure a reasonable titre and to make the colour change easier to spot.

https://en.m.wikipedia.org/wiki/Complexometric_titration

(edited 2 weeks ago)

Reply 2

Evle_13

Original post by TypicalNerd

Whilst I personally haven’t done it, I would probably suggest doing a complexometric titration, if you can.
Essentially it would be a titration against EDTA with eriochrome black T indicator where the solution is buffered to maintain a pH of around 10. You would of course need to dilute down the milk sample to ensure a reasonable titre and to make the colour change easier to spot.
https://en.m.wikipedia.org/wiki/Complexometric_titration

Thank you so much that’s super helpful!