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Ch.22 - The Main Group Elements

Chapter 22, Problem 22.132a

Write a balanced net ionic equation for the reaction of the amphoteric oxide ZnO with:

a. Hydrochloric acid

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Hello everyone. Today, we have the following problem. Tin oxide is an amphoteric oxide. Provide the balanced net ionic equation for the reaction of tin oxide with hydrochloric acid. So when an inverter oxide reacts or acts as an acid, the general form that the reaction will provide will be M which is the metal. And then we have the hydroxide form with a subscript of X N minus ions. And if it is a base, then the reaction will simply form salt and water. So, hydrochloric acid is a strong acid. So in this environment, tin oxide will act as a base. So we will form salt and water. So if we have our tin oxide, which is a solid forming with hydrochloric acid, which is aqueous, we will form tin chloride which is also aqueous and water. So we have our salt and we have our water. So to write the net ionic equation, we need to separate or break up soluble ionic compounds that are only in aqueous forms. Recall that solids, liquids and gasses do not break up or they do not undergo dissolution. And so this will actually assume the correct form of tin oxide but then we will have hydrogen aqueous ions plus chloride aqueous ions. And then we will have our 10, two plus aqueous ions followed by hour chloride aqueous ions. And of course, we have water. So to balance this equation out, we simply look at how many of each um or element that we have on each side. So our 10, we both have one on each side of the reaction arrow for oxygen, we have one on the left and we have one on the right for our hydrogens though we have one on the left and two on the right. So we can multiply our coefficient of that hydrogen or the proton by two. And we look at our chlorides, we have one on the left two on the right. So we can multiply that coefficient of chloride by two. And so if we were to cross out our spectator ions, which would be our chlorine, we would get the remaining or the following balance net ionic equation. And this best corresponds with answer choice B and so with that, we have solved the problem overall, I hope this helped. And until next time.