Question Summary:
Can you dedicate a two rakaat prayer of a fast (sawm) for something?

Question Detail:

 Can you dedicate a two rakaat prayer of a fast (sawm) for something?
 

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Your question is unclear. Are you referring to making a vow that if so and so happens, I shall pray two rakaats or keep a fast or you referring to something else? Kindly explain in detail.
And Allah Ta’āla Knows Best
Bilal Issak
Student Darul Iftaa
Leicester, England, UK
Checked and Approved by,
Mufti Ebrahim Desai.