Salma,

if you prepeared 0,025 solution of FAS:

- use just only volume of K2Cr2O7 (25ml), without water,

- and formula:

Molarity of FAS = (Volume of K2Cr2O7 (25 ml) * 0,025) / Volume of FAS used in titration (ml)

Regards

Thanks a lot Izabela for your respond.

But in closed reflux method 5 ml of K2Cr2O7 should be taken.

So according to your answer, 25 ml should be taken instead of 5 ml to be titrated without water?

Regards

Thanks a lot Izabela for your respond. But in closed reflux method 5 ml of K2Cr2O7 should be taken. So according to your answer, 25 ml should be taken instead of 5 ml to be titrated without water?

Regards

Thanks a lot Izabela for your respond.

But in closed reflux method 5 ml of K2Cr2O7 should be taken.

So according to your answer, 25 ml should be taken instead of 5 ml to be titrated without water?

Regards

Sama,

but you want to standarize FAS 0,025 solution,

you can use different volume.

The larger volume of sample you take, the greater volume of tittant you use. The determination will be more exact.

So again:

Molarity of FAS = (Volume of K2Cr2O7 (for example 25 ml) * 0,025 (this is the concentration assumed) / Volume of FAS used in titration (ml)

Regards,

Izabela

Can you send me the protocol for the Standardization of FAS .

email [email protected]