HI (aq) \text { HI (aq) } HI (aq)
HBr(aq)\mathrm{HBr}(\mathrm{aq})HBr(aq)
HCl(aq)\mathrm{HCl}(\mathrm{aq})HCl(aq)
HF (aq) \text { HF (aq) } HF (aq)