Which is the stronger acid, the ammonium ion or the hydroxylammonium ion?

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Welcome back everyone to another video in circle, the weaker base between the two and explain why we're given two bases, hydro cyanide and hydrosulfide. And in order to answer which one is the weaker base, we want to identify a stronger acid, right? Because the acid trend is inversely proportional to the conjugate base strand. So actually, we're going to consider the stronger conjugate asset, meaning we are going to turn each base into its corresponding conjugate acid. And we can do that by adding an extra hydrogen. So we get H two se or H two S and to understand which one is a, is a stronger acid, we essential one to understand that they are very similar except from the central atom. So we are comparing selenium versus sulfur, we have to understand that selenium and sulfur, they essentially belong to the same group in the periodic table. And when we go down the group, the atomic radius increases. And therefore, we can say that the hydrogen selenium, the hydrogen selenium bond is longer, then the hydrogen sulfur bond based on the fact that selenium has a larger radius. And because that bond is longer, the attraction force between hydrogen and selenium is weaker. And therefore, it is easier to break that bond and release hydrogen into a solution in the form of an acidic proton. And therefore, h two se is a stronger acid because it is a stronger acid. We're going to say that HSE negative is a weaker base dan hydrosulfide hs negative. So we can essentially conclude and say that hydro cyanide is a weaker base than hydro sulfide because H two se is a stronger acid than H two S. That would be it. Thank you for watching.

Which is the stronger acid, the ammonium ion or the hydroxylammonium ion?

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Key Concepts

Acid Strength

Ammonium Ion (NH4+)

Hydroxylammonium Ion (NH3OH+)