# What three factors affect how fast or slow a substance will dissolve in a solution?

Jan 12, 2017

$\text{For a given solvent and solute..................}$, and remember we deal with the $\text{rate of dissolution}$.

#### Explanation:

$1.$ $\text{Intrinsic solubility}$. In general a polar solvent will solvate polar and ionic solutes, and poorly solvate (i.e. dissolve) apolar solutes.

$2.$ $\text{Temperature:}$ dissolution is in general a bond breaking process. The higher the temperature, the greater (and faster) the dissolution.

$3.$ $\text{Sample size}$: clearly a pulverized solute, i.e. a fine powder, will have a greater surface area than a block of solute, and thus its rate of dissolution should be greater.

I would be interested to see your teacher's answer to this question, to see if these answers agree with his or hers, so I would be grateful if you would oblige. I am reminded of the old Groucho Marx quip:

$\text{Those are my principles; if you don't like them, I have others......}$