cold of ice + salt + water

[max.yevs]

I'm sorry if this is the wrong section, perhaps it belongs in physics, but

 

how cold is ice + salt + water? I'm wondering because most of the places I look it says like -10 degrees, which seems about right if you use the freezing point depression equation.

 

However, I was easily able to condense a drop of chlorine (I'll get a better picture soon, but here), whose boiling point is -35 degrees celsius, -30f. I used water + ice + a good amount of magnesium sulfate and sodium chloride.

 

I think maybe because I used two different salts, i was able to circumvent the common ion effect...

 

oh, and don't make chlorine.

Edited March 30, 2009 by max.yevs

[UC]

I'm sorry if this is the wrong section, perhaps it belongs in physics, but

 

how cold is ice + salt + water? I'm wondering because most of the places I look it says like -10 degrees, which seems about right if you use the freezing point depression equation.

 

However, I was easily able to condense a drop of chlorine (I'll get a better picture soon, but here), whose boiling point is -35 degrees celsius, -30f. I used water + ice + a good amount of magnesium sulfate and sodium chloride.

 

I think maybe because I used two different salts, i was able to circumvent the common ion effect...

 

oh, and kids: don't make liquid chlorine.

 

no. There's an almost 100% chance that is just cold water with chlorine dissolved in it.

[max.yevs]

ok UC, I know that picture is horrible and inconclusive. And you could argue that there was moisture in the air which condensed. But I'm pretty sure it was chlorine. But I guess I can't argue that at this point.

 

I'll have to make chlorine again, I need it to precipitate iodine. Maybe a more convincing picture this time.

Edited March 30, 2009 by max.yevs