How do we assess the solubilities of various salts in various solutions?

Answer 1

#K_(sp)# values are usually tabulated for a variety of sparingly soluble and insoluble salts. Of course, this relies on initial measurments (usually by the use of radioisotopes).

You still have to be able to use the #K_(sp)# values in a variety of situations. #PbCl_2# should be more soluble in pure water than in hydrochloric acid. Why should this be so?

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Answer 2

Naomi Aronson

Solubilities of salts in solutions are assessed through experimental methods, including titration, gravimetric analysis, and spectrophotometry. Titration involves adding a standardized solution to the salt solution until a reaction endpoint is reached. Gravimetric analysis measures the mass of a precipitate formed by the reaction. Spectrophotometry quantifies solubility by measuring absorbance or transmittance of light through the solution. Factors affecting solubility include temperature, pressure, and the nature of the solvent and solute.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.