Four salts are tested by adding of each to of water at

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

Four salts are tested by adding

0.10\,\text{g}

of each to

100\,\text{mL}

of water at

25^{\circ}\text{C}

, and the qualitative observations are recorded.

Salt	$K_{sp}$	Observation
R	$6.5\times10^{-15}$	Dissolves completely; no solid remains visible
S	$4.2$	Some undissolved solid persists at the bottom of the beaker
T	$2.1\times10^{-3}$	Slight cloudiness forms but then clears as the solid disappears
U	$9.0\times10^{-9}$	A noticeable amount of solid quickly settles out

Which observation is LEAST consistent with the listed

K_{sp}

value? (a) The observation for salt S (b) The observation for salt R (c) The observation for salt T (d) The observation for salt U