Magnesium milk is a mixture of magnesium hydroxide, Mg (OH) 2 in water, often used as a medicine against overproduction of stomach acid, i. e. hydrochloric acid, HCl, but its molecular concentration in gastric juice is about 0.10 M.
Calculate how many grams of Mg (OH) 2 are needed to consume 47 ml of stomach acid.

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.