Magnesium bromide is prepared in a laboratory using the reaction below. Typically, the magnesium bromide is recovered as a solid
by heating away the remaining water.
MgO(s) + 2 HBr(aq) → MgBr2(aq) + H2O(1)
If 0.860 mole of HBr in solution is added to 14.0 grams of MgO in
a beaker and then
is heated until dry, what are the expected contents of the beaker?

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.