# Problem: Here are the solubilities of some salts in water. For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °C. One significant figure is sufficient in each answer. (a) Pb(NO3)2 (b) KCl(c) K2Cr2O7

###### FREE Expert Solution

We are asked to determine how much of the given salts will remain undissolved if 500 g is mixed into a liter of pure water at 40 °C.

We shall refer to books and on the internet regarding the solubilities of these salts.

For Pb(NO3)2. Nitrates are highly soluble in water. Based on the literature, it has a solubility of 720.1 g/L. Therefore, it would be completely dissolved and none would remain when mixed with pure water at 40°C.

For KCl. Based on the literature, it has a solubility of 401 g/L. Therefore, it would not completely dissolve in pure water. The remaining undissolved salt is:

98% (323 ratings)
###### Problem Details

Here are the solubilities of some salts in water. For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °C. One significant figure is sufficient in each answer.

(a) Pb(NO3)2

(b) KCl

(c) K2Cr2O7