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Estimation of chloride & sulphate

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swati:
How can we estimate chloride and sulphate present in the same solution ?

Can we use AgNO3 first to estimate chloride & then in the remaining solution only sulphate is present which can be estimated using BaCl2?

Am I correct?

Borek:
What is Ag2SO4 solubility?

Hispania:
I think Ag2SO4 is only partially soluble (kps=1,4*10-5 M3), so it must be difficult to do.

I´d add BaCl2, calculate SO4 (BaSO4 is insoluble), and filter the white solid.
Then (when there´s not SO4 in solution) I´d add AgNO3 and calculate Cl- (knowing the quantity of BaCl2 we have added to subtract later).

Borek:

--- Quote from: Hispania on September 03, 2006, 12:45:41 PM ---Then (when there´s not SO4 in solution) I´d add AgNO3 and calculate Cl- (knowing the quantity of BaCl2 we have added to subtract later).

--- End quote ---

Think about the way to avoid subtraction.

Hispania:

--- Quote from: Borek on September 03, 2006, 01:16:10 PM ---
--- Quote from: Hispania on September 03, 2006, 12:45:41 PM ---Then (when there´s not SO4 in solution) I´d add AgNO3 and calculate Cl- (knowing the quantity of BaCl2 we have added to subtract later).

--- End quote ---

Think about the way to avoid subtraction.

--- End quote ---

O.K.. How about using Ba(NO3)2 instead of  BaCl2?

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