# Solubility Thallous Chloride

• the.flea
Good job.In summary, the experiment involved adding 6.5g of thallous chloride to 750ml of water at room temperature to determine its solubility and Ksp. After stirring for 4 hours, the solution was declared saturated and a 400ml sample was decanted off and evaporated to dryness, leaving 1.20g of thallous chloride. The solubility was found to be 0.0125mol/L and the calculated Ksp was 1.56E-4.

#### the.flea

[SOLVED] Solubility Thallous Chloride

## Homework Statement

6.5g of thallous chloride is added to 750ml of water at room temperature to determine Ksp. The solution is stirred from time to time over a 4h period. Some thallous chloride does not dissolve and the solution is declared saturated. A 400ml sample of the solution is decanted off and evaporated to dryness. The weight of thallous chloride that remains is 1.20g.
a) What is the solubility of thallous chloride?
b) What is Ksp for thallous sulfate?

TlCl -> Tl +Cl
Ksp=[Tl][Cl]

## The Attempt at a Solution

6.5g=0.027 mol
c=0.036 i don't know what else to if no ksp is given something to get me started would be helpful.thnks

Where is thallous sulfate mentioned in the problem ( part b ) ?

So the solubility of thallous chloride is 1.20g / 400 mL of water without respect to volume change from dissolution of the thallous chloride. Express this in the appropriate units.

oh in part b it is a typo. so 6.5g (750ml) is irrelevant?

the.flea said:
oh in part b it is a typo. so 6.5g (750ml) is irrelevant?

No it doesn't matter ; now simply convert the saturated amount of thallous chloride into moles and then use the molecular formula to fill in the values for the Ksp equation to solve for Ksp. Show your steps.

m=1.2g TlCl-->Tl + Cl
mm=239.83g 1 : 1 : 1
n=0.005mol
c=n/v
c=0.0125mol/L
solubility = c

Ksp=[0.0125][0.0125]
=1.56E-4
is this correct?

OK.