How can I calculate molality of ions in solution?
For example, if you dissolve 1.0 moles of NaCl in 1.0 kilogram of solution, you will have 1.0 molal concentration of sodium chloride.
Because sodium chloride not only dissolves in water, but dissociates into ions, each ion, the sodium and the chloride ion will be 1.0 molal.
Consider another ionic compound, calcium chloride, which has the formula,
The number of ions impacts colligative properties which in turn affects boiling point elevation, freezing point depression, and vapor pressure.