Write a balanced net ionic equation for the following reaction

bacl2(aq)+h2so4(aq) -> baso4(s)+hcl(aq)

i know the balanced equation for this reaction would be bacl2 + h2so4 > baso4 + 2hcl but i need writing the balanced net ionic equation. with steps pls.

 Best   We would write the molecular equation as  
BaCl2(s) + H2SO4(aq) --> BaSO4(s) + 2HCl(aq) 

You would write the ionic equation as 
BaCl2(s) + H+ + HSO4^- --> BaSO4(s) + 2H+ + 2Cl- 

remove the H+ from both sides and write the net ionic equation as 
BaCl2(s) + HSO4^- --> BaSO4(s) + H+ + 2Cl- 

If you placed BaCl2 solid in sulfuric acid it would quickly acquire a coating of insoluble BaSO4 which will prevent the further reaction of the barium chloride. 

The same is true if you took a block of BaCl2 and placed a drop of H2SO4 solution on it. The solid BaSO4 that forms will block further reaction. You would get HCl gas only if the small amount of solution became saturated in HCl.

Yes it would be a physical change.