Peroxide and Superoxide Reactions - Video Tutorials & Practice Problems
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1
concept
Reaction with Water
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1m
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Now, when it comes to the reaction with water, we're going to say that peroxides react with water like oxides but produce hydrogen peroxide as an additional product. Now remember we know that when oxides react with water, we're gonna create hydroxide something that's basic. But with peroxides, we add hydrogen peroxide as well. So here we have barium peroxide reacting with liquid water. It produces what we expect barium hydroxide. But because it peroxide ion is a little bit more complex than the oxide ion. We make hydrogen peroxide as well to balance this. We put it to here for super oxides, they produce hydrogen peroxide as an additional product, but also oxygen 02. So here for our super oxides, we have potassium super oxide reacting with liquid water. We produce our potassium hydroxide plus our hydrogen peroxide plus oxygen gas to balance it. We put it to here here and here. So just remember if you can recall what we did for oxide reactions, peroxide reactions and super oxide reactions are the same with a few additional products at the end. So keep that in mind when we're dealing with peroxides and super oxides
2
example
Peroxide and Superoxide Reactions Example
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54s
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Here, it says complete imbalance the following equation. So what is that? Well, this is sodium peroxide because if we broke it back down into its representative elements or representative ions, we'd have sodium ion and the peroxide ion. Remember when a peroxide reacts with water, we're gonna create our hydroxide. So sodium hydroxide and what else? Hydrogen peroxide? H2o 2, all we have to do now is balance it out. So we throw a two here and we throw a two here doing that will give us an overall balance equation with two ni two sodiums on both sides, four oxygens on both sides, four hydrogens on both sides. So this would be our final balanced equation.
3
Problem
Problem
Write a balanced equation for the reaction of rubidium superoxide with water.
When it comes to the reaction with acids, we're gonna say peroxides react with acids to produce hydrogen peroxide. Instead of water. Super oxides produce oxygen in addition to hydrogen peroxide. So if we take a look here, we have our peroxides, we have sodium peroxide reacting with hydrochloric acid. It forms our salt. And because it's a peroxide, it also produces hydrogen peroxide to balance it. We put a two here and a two here with super oxides. We're reacting with an acid again in the form of nitric acid. Now, we produce our salt or ionic compound in the form of potassium nitrate and we produce hydrogen peroxide. And because it is a super oxide, we also make oxygen gas balancing this out. We put it to here here and here. So this represents the types of reactions that occur when we have a peroxide or superoxide reacting with an acid.
5
example
Peroxide and Superoxide Reactions Example
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1m
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Here, we say complete and balance the following reaction here, we have cesium super oxide reacting with an acid. So remember when a super oxide is reacting, we're gonna make our salt which would be cesium sulfate plus we make hydrogen peroxide. And because it's a super oxide, we'd also make oxygen gas. Now, here we'd have to balance this out. So let's see. We have two sessums here. So we put a two here. We have one sulfate, one sulfate. We have two hydrogens here, two hydrogens here and we have four oxygens, 212 and we have four oxygens here, two times two is four. So this will represent our balanced equation between the reaction of cesium super oxide and sulfuric acid.
6
Problem
Problem
Write a balanced equation for the reaction of barium peroxide with hydrochloric acid.
A
BaO(s) + 2 HCl(aq) → BaCl2(aq) + H2O(aq)
B
2 Ba2O(s) + 2 HCl(aq) → 2 Ba2Cl(aq) + H2O2(aq)
C
Ba2O2(s) + 2 HCl(aq) → 2 BaCl(aq) + H2O2(aq)
D
BaO2(s) + 2 HCl(aq) → BaCl2(aq) + H2O2(aq)
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