What will happen if I mix sulphuric acid and iodine?

If you mix sulphuric acid with iodine (I2), not much. Probably dissolve the iodine so the mess will become somewhat purple in color. read more

If you mix sulphuric acid with iodine (I2), not much. Probably dissolve the iodine so the mess will become somewhat purple in color. Now, if you meant to ask what will happen if you mix sulphuric acid and iodide (I(1-)) then that is a different story. Iodide is a strong enough reducing agent to reduce sulphuric acid. read more

Sulphuric acid is one of the cheapest choices, but dilute hydrochloric acid will do the same trick. $\ce{NaHSO4}$ (which I hope is the correct chemical; I never understood the bi-nomenclature and prefer hydrogen sulphate) may work since it is still pretty acidic, but you would need higher concentrations. read more