Question

please solve 42 number
I will Mark as brainlist

Answer 1

The option (2) is correct because the enthalpy of ionisation of HA is (q1-q2)...
Explaination--I won't show it here but I've found ΔH1 to be -52.33 kJ/mol and ΔH2 to be -5.21 kJ/mol. I don't know how to get the third enthalpy though, I know you'd use Hess' law but I don't really understand what to do here.
Staff: Mentor Obviusly you have to start with the second reaction, as it has HA and A- in correct places. Then use the first reaction to get rid of OH- on the LHS and H2O on the RHS.