Calculate the freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water. (`K_(f)` for water `= 1.86^(@)"mol"^(-)`).

Explanation

To calculate the freezing point of a 1 molal NaCl solution, we will follow these steps:

### Step 1: Identify the dissociation of NaCl
When NaCl (sodium chloride) dissolves in water, it dissociates completely into its ions:
\[ \text{NaCl} \rightarrow \text{Na}^+ + \text{Cl}^- \]
This means that for every mole of NaCl that dissolves, it produces 2 moles of ions (1 mole of Na\(^+\) and 1 mole of Cl\(^-\)).

### Step 2: Determine the van 't Hoff factor (i)
...