the solubilities of three salts in water are shown in the graph. for each salt, determine how much will…

the solubilities of three salts in water are shown in the graph. 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. pb(no₃)₂: 250 g kcl: 100 g k₂cr₂o₇: 0 g

the solubilities of three salts in water are shown in the graph. 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. pb(no₃)₂: 250 g kcl: 100 g k₂cr₂o₇: 0 g

Answer

Explanation:

Step1: Read solubility from graph

From the graph, at 40°C, the solubility of (Pb(NO_3)_2) is about 750 g/L, of (KCl) is about 400 g/L and of (K_2Cr_2O_7) is about 500 g/L.

Step2: Calculate undissolved amount for (Pb(NO_3)_2)

Since solubility of (Pb(NO_3)_2) is 750 g/L and we have 500 g, all 500 g will dissolve, so undissolved amount is 0 g.

Step3: Calculate undissolved amount for (KCl)

We have 500 g of (KCl) and solubility is 400 g/L. Undissolved amount = (500 - 400=100) g.

Step4: Calculate undissolved amount for (K_2Cr_2O_7)

We have 500 g of (K_2Cr_2O_7) and solubility is 500 g/L. So undissolved amount is (500 - 500 = 0) g.

Answer:

(Pb(NO_3)_2): 0 g (KCl): 100 g (K_2Cr_2O_7): 0 g