When $17\mathrm{.}6g$ of alanine $(C_3{H}_{7}N{O}_2)$ are dissolved in $550.g$ of a certain mystery liquid $x,$ the freezing point of the solution is $2\mathrm{.}3C$ lower than the freezing point of pure $x.$ On the other hand, when $17\mathrm{.}6g$ of potassium bromide are dissolved in the same mass of $x,$ the freezing point of the solution is $3\mathrm{.}1C$ lower than the freezing point of pure $x.$

Calculate the van't Hoff factor for potassium bromide in $x.$ Be sure your answer has a unit symbol, if necessary, and round your answer to $2$ significant digits.