Question

part a
what is the solubility of ki at 10c?
a 145 g
b 7 g
c 135 g
d 18 g
part b
if you create a 70g solution of hcl at 50c, how would you classify the
solution?
a unsaturated
b none of the above
c supersaturated
d saturated
part c
which compound has the lowest solubility at 80 c?

Explanation:

Part A

Locate the \(KI\) curve on the solubility - temperature graph. Find the value on the \(y\) - axis (grams of solute per \(100gH_2O\)) corresponding to \(10^{\circ}C\) on the \(x\) - axis. By observing the graph, when \(x = 10^{\circ}C\) for \(KI\), \(y=135g\).

Locate the \(HCl\) curve on the graph. At \(50^{\circ}C\), find the solubility of \(HCl\) (grams of \(HCl\) per \(100gH_2O\)). Assume the solubility of \(HCl\) at \(50^{\circ}C\) is \(S\). A solution is unsaturated if the amount of solute is less than the solubility at that temperature. If we assume the solubility of \(HCl\) at \(50^{\circ}C\) is greater than \(70g\) (by looking at the \(HCl\) curve on the graph, since the \(HCl\) curve is above the \(70g\) mark for \(50^{\circ}C\)), then a \(70g\) solution of \(HCl\) at \(50^{\circ}C\) has less solute than the maximum amount that can dissolve at that temperature.

Answer:

C. \(135g\)

Part B