Every antacid contains one or more ingredients capable of reacting with excess stomach acid (HCl). The essential neutralization products are CO₂ and/or H₂O. Write net ionic equations to represent the neutralizing action of the following popular antacids.

(a) Alka-Seltzer (sodium bicarbonate)

(b) Tums (calcium carbonate)

(c) Milk of magnesia (magnesium hydroxide)

(d) Maalox (magnesium hydroxide, aluminum hydroxide)

(e) Rolaids [NaAl(OH)₂CO₃].