Hi Nur,

I apologize if I do not understand your question correctly but here is my answer:

Basically the quoted concentrations are the maximum quantity which is soluable at those temperatures.

So long as you are only adding less than this maximum you can control what you add and then dilute as neccersary to achieve different concentrations, i.e at 20C ambient room temperature:

MW for HgCl2 is 271.52g, so you would need to dissolve 271.52g in 1L of water to achieve 1M concentration - which is clearly not possible - the maximum concentration is:

74 / 271.52 = 0.27M

Therefore to achieve different concentrations you could make a solution with 54.3g of HgCl2 in 1L of water giving you a concentration of 0.2M

You can then dilute this 0.2M solution to lesser concentrations by adding more water. Changing the temperature at this point will not affect the concentration unless you cool the water to the point where the solubility is less than the dissolved quantity of HgCl2 - in which case it will precipitate and come out of solution.

Pick a suitable concentration less than the maximum for the range of temperatures you are working in.

Hope this helps,

Matthew

High Nur, I think it is depend on both solubility will increase with temperature and decrease by extra of water at the condition -which you mentioned up- on it and the only constant is volume (1 L)

regards

Hi Nur,

I apologize if I do not understand your question correctly but here is my answer:

Basically the quoted concentrations are the maximum quantity which is soluable at those temperatures.

So long as you are only adding less than this maximum you can control what you add and then dilute as neccersary to achieve different concentrations, i.e at 20C ambient room temperature:

MW for HgCl2 is 271.52g, so you would need to dissolve 271.52g in 1L of water to achieve 1M concentration - which is clearly not possible - the maximum concentration is:

74 / 271.52 = 0.27M

Therefore to achieve different concentrations you could make a solution with 54.3g of HgCl2 in 1L of water giving you a concentration of 0.2M

You can then dilute this 0.2M solution to lesser concentrations by adding more water. Changing the temperature at this point will not affect the concentration unless you cool the water to the point where the solubility is less than the dissolved quantity of HgCl2 - in which case it will precipitate and come out of solution.

Pick a suitable concentration less than the maximum for the range of temperatures you are working in.

Hope this helps,

Matthew