# Which is more effective at raising the boiling point of a soup? Why? SrBr2 Ca3N2 KCl CH4

Apr 25, 2016

$\text{Calcium nitride}$, mind you I would not want to eat the soup afterwards.

#### Explanation:

Boiling point elevation is proportional to the number of species in solution; it is a colligative property.

$K C l \left(s\right) \rightarrow {K}^{+} + C {l}^{-}$

$S r B {r}_{2} \left(s\right) \rightarrow S {r}^{2 +} + 2 B {r}^{-} \left(a q\right)$

$C {a}_{3} {N}_{2} \left(s\right) + 6 {H}_{2} O \rightarrow 3 C {a}^{2 +} + 6 H {O}^{-} + 2 N {H}_{3} \left(a q\right)$

Calcium nitride would give by far the most particles in solution on a per mole basis, and of course, the ammonia would speciate.

The only such contaminant I would put in my soup would be $\text{sodium chloride}$. How would this affect the boiling point?

Methane. $C {H}_{4}$, is a volatile, non-ionic species. You could use this to cook the soup.