what is the ionic equation for 2HNO3(aq)+Ba(OH)2(aq)

2H^+ + 2OH^- ==> 2H2O

To find the ionic equation for the given reaction, you need to first write the balanced molecular equation and then separate the soluble strong electrolytes into ions.

Step 1: Write the balanced molecular equation:
2HNO3(aq) + Ba(OH)2(aq) ⟶ 2H2O(l) + Ba(NO3)2(aq)

Step 2: Separate the soluble strong electrolytes into ions:
HNO3: 2H+(aq) + NO3-(aq)
Ba(OH)2: Ba2+(aq) + 2OH-(aq)
H2O: H2O(l)
Ba(NO3)2: Ba2+(aq) + 2 NO3-(aq)

Step 3: Write the ionic equation by eliminating the spectator ions (those that appear on both sides of the equation):
2H+(aq) + 2OH-(aq) ⟶ 2H2O(l)

Therefore, the ionic equation for the reaction 2HNO3(aq) + Ba(OH)2(aq) is:
2H+(aq) + 2OH-(aq) ⟶ 2H2O(l)