A1 molal solution of mgcl2 has a higher boiling point than a 1 molal solution of? 1)fecl2 2)cacl2 3)bacl2 4)nacl

option 4) NaCl

Explanation:

The boiling point of a solvent increases as the number of dissolved particles of solute increase.

The formula is:

ΔTb = i * m * Kb.

Where i is the van't Hoff constant, m is the molality of the soluton and Kb is the molal boiling constant.

i accounts for the dissociation of the particles, the higher the number of ions a compound yields in solution the hiigher the i factor and the higher the increase in the boiling point.

The ionic compound Mg Cl2 dissociate into 1 ion Mg (2+) and 2 ions Cl (-), which is 3 ions.

The compounds FeCl2,  CaCl2, and BaCl2, all three, also dissociate into 3 ions each, so there is not difference with MgCl2.

On the other hand, NaCl dissociattes into two ions: Na(+) and Cl(-) which means that this solute will have a lower incidence on the increase of the boiling point, being the answer to the question.