Which of these substances contributes to soap's slippery textu...

Question

Which of these substances contributes to soap's slippery texture: an acid, a base, carbonate, or water?

Accepted Answer

hey everyone in this example, we need to pick the property that is not a property of an acid as our final choice. So looking at choice A it says that acids produce hydro ni um ion in water. And we recall that hydro knee um ion is the H plus or H +30 plus cad ions. So we want to recall that this is actually true and this is true when water act as a base. Moving on to statement B, we can rule out choice A because it is a property of an acid, which we do not want to choose as our answer. So moving onto choice B. It says that acids react with active metals. So we are actually going to also agree with the statement and we want to go ahead and consider the following reaction where we have zinc which is an active medal reacting with hydrochloric acid, which we recall is one of our strong assets. This is going to form the product where we form Zn cl two as a product as well as H two gas. Now, to balance this reaction out, we're going to place a coefficient of two in front of our hydrochloric acid. And as you can see, we definitely have an active medal reacting with an acid. Whenever we have this combination, they typically form a gas being H two gas, hydrogen gas. And in order to understand how this happens, we want to recall that think is and oxidized adam. We want to recognize that it gets oxidized because it gains or releases two electrons. So it's ZN two plus as an as a caddy on and it's going to release those two electrons to get its catatonic charge. And so how we form the hydrogen gas is that these two electrons that the zinc releases are going to be picked up by protons by specifically to h plus protons. So we would have to h plus protons gaining or picking up these two electrons from our zinc metal, which is going to form hydrogen gas. And this is an example of a reduction because it's gaining electrons whereas zinc goes through oxidation because it releases or loses electrons. And so this is exactly how acids react with active metals, which will form hydrogen gas. So we can go ahead and rule out choice B because we know it's a property of an acid which we don't want to choose as our answer. Moving on to choice. See it says that acids react with bases to form salt and water. And we want to recognize that this type of description is describing a neutralization reaction. So we can think of the following example where we have a strong acid hcl reacting with a strong base sodium hydroxide where we're going to go through a double displacement or double replacement, where we form the products sodium chloride and water liquid water. And so because we also would agree that this is a true property of an acid as a type of reaction. We can rule out choices because we don't want to choose that as a answer choice. Moving on to choice D. It says that acids taste sour. And we actually would also agree with the statement as a property of an acid. And that is because the high Joni um Canadian or high germanium ions trigger sour taste receptors in our mouths. And so they're characterized to be sour. So we do know that this is a property of an asset so we can rule that I was as a choice. And lastly we have the statement that acids are slippery to the touch. So we actually would disagree with this statement. We want to recognize that actually bases are slippery to the touch, but acids just feel normal. They're just going to experience a wetness because they are going to be liquids. And so we can go ahead and actually consider e to be our answer because it is not a property of an asset, that is a property of a base. So this will complete this example. If you have any questions, please leave them down below. And I will see everyone in the next practice video

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Which of these substances contributes to soap's slippery texture: an acid, a base, carbonate, or water?

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