Quantitative Analysis of Ions (HSC SSCE Chemistry): Flashcards

Precipitation titrations and gravimetric analysis

Ion concentrations using precipitation reactions

Chromate ions ($\text{CrO}_4^{2-}$)

pH 6-9

Back titration in acidic solution

$\text{Fe}^{3+}$ ions, blood-red $\text{Fe(SCN)}^{2+}$ complex

Adsorb onto precipitate surface and change colour

Mass measurements of precipitates

Contamination, loss, incomplete pptn, retained water

Dry to constant mass (repeat until no change)