Chemistry: Van´t Hoff factor for baking soda

[Lemm]

Hello,
Im writing up a lab involving boiling point elevation of distilled water when solutes are added to it and I am using the equation:

deltaT = iKm

where:
deltaT is the change in boiling point of the solvent,
K is the molal boiling point elevation constant, and
m is the molal concentration of the solute in the solution.

I calculated the predicted elevation for salt and sugar, which i could find their van´t hoff factor to be 2, and 1 respectively. However I fail to find the van´t hoff factor for baking soda, could somebody please provide me with this value?
Thanks

 

[Borek]

What is a baking soda formula? How does it dissolve? Does it dissociate? Can you write reaction equation?