Which of the following compound(s) cannot be classified as an acid? A. H 2 S B. HCN C. H 2 D. C 2 H 6 E. All are acids

Okay, guys, we're not gonna look at the practice question at the end of the page where I asked you to identify, which could not be classified as an acid. So if we take a look here, we should know that obviously H two s is a binary acid that we talked about because it's a Group six say and it's combined with h plus. And then HCM was one of the odd ones we talked about as well. So we know those two are acids. Now the real question is is h two and C six h six. Are they asked? Now this one was a little tricky, But what you need to realize is for an acid to exist, the compound itself has to be polar. How do we know when element is polar? How do we know that an asset is polar? What we've said it earlier? We said that H plus has to be connected to an electro negative element, and electro negative elements are these guys remember for us to remove an H plus away from the acid. The bond itself has to be polar. Polar means that it's very unstable and because it's very unstable where it's possible for us to break that bond. That's how all acid base chemistry works. For us to remove an H plus, we have to have a polar bond. And for to be polar, H plus needs to be connected to something very electoral negative. One of these elements here now if we take a look at H two h two would be non polar because we have the same elements connected together. So there's no polar bond that exists, so that could not be an acid. Also, when we have a compound with just carbons and hydrogen, there is no real difference in electro negativity. The number is different, but not significantly. It's so small, in fact, that we're gonna say anytime we have a compound with just carbons and hydrogen, it's going to be non polar. So again, make a note of that. Any time you have just carbon and hydrogen, it's gonna be non polar because it's non polar. It can't be acidic, so the answer here would be both. CND could not exist as acids because both are non polar. For an acid to exist, we need to have some types of polar bonds even if you guys didn't get this question, correct. Don't worry. I really didn't tell you too much in the beginning. And if you got it wrong, that's okay. But just make a note. Now. Acids are polar compounds because they have polar bonds involved. Somewhere, if the bond is polar, it can act as an acid. If it's non polar, it can't.

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17. Acid and Base Equilibrium

Acids Introduction

General Chemistry

17. Acid and Base Equilibrium

Acids Introduction

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Multiple Choice

Which of the following compound(s) cannot be classified as an acid?
A. H₂S
B. HCN
C. H₂
D. C₂H₆
E. All are acids

A and B

A and C

C and D

B and C

All are acids

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Verified step by step guidance

Step 1: Understand the definition of an acid. According to the Brønsted-Lowry theory, an acid is a substance that can donate a proton (H⁺ ion) to another substance.

Step 2: Analyze each compound to determine if it can donate a proton. Start with H₂S. This compound contains hydrogen and can potentially donate a proton, classifying it as an acid.

Step 3: Examine HCN. This compound also contains hydrogen and can donate a proton, making it an acid.

Step 4: Consider H₂. Although it contains hydrogen, it is a diatomic molecule and does not readily donate a proton under normal conditions, so it is not classified as an acid.

Step 5: Evaluate C₂H₆ (ethane). This compound is a hydrocarbon and does not have a hydrogen atom that can be easily donated as a proton, so it cannot be classified as an acid.