Sapling #12

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haley f
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Sapling #12

Postby haley f » Tue Dec 08, 2020 3:58 pm

Arrange the oxoacids of chlorine according to strength. HClO4, HClO3, HClO2, HClO
How do you know which of these has the strongest bond to oxygen?
Last edited by haley f on Tue Dec 08, 2020 6:57 pm, edited 1 time in total.

emilyyribarren1k
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Re: Sapling #12

Postby emilyyribarren1k » Tue Dec 08, 2020 4:23 pm

The solution was that as the number of oxygen atoms increases, the strength of the O-H bond decreases, so the strength of the acid increases. I thought it was the opposite though because if there are more oxygen atoms they would hold the hydrogen more tightly making the O-H bond stronger and the acid weaker. Can someone explain why this is incorrect?

haley f
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Re: Sapling #12

Postby haley f » Tue Dec 08, 2020 6:58 pm

I was actually wondering the same thing because if the bonds are tighter they hold the H more closely, so it doesn't make sense that it is the opposite.

MichaelRaad_1F
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Re: Sapling #12

Postby MichaelRaad_1F » Tue Dec 08, 2020 11:55 pm

I think the question was just trying to show us that the more oxygen atoms present in the molecule, the higher the strength of the acids because the more oxygen atoms, the weaker the bond to hydrogen is in the molecule.

emilyyribarren1k
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Re: Sapling #12

Postby emilyyribarren1k » Wed Dec 09, 2020 1:06 pm

MichaelRaad_3C wrote:I think the question was just trying to show us that the more oxygen atoms present in the molecule, the higher the strength of the acids because the more oxygen atoms, the weaker the bond to hydrogen is in the molecule.

But why would the bond be weaker with more oxygen atoms?

Crystal Pan 2G
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Re: Sapling #12

Postby Crystal Pan 2G » Wed Dec 09, 2020 1:48 pm

The more oxygen atoms there are, the stronger the acid.

Brendan Duong 1I
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Re: Sapling #12

Postby Brendan Duong 1I » Wed Dec 09, 2020 2:05 pm

Crystal Pan 1B wrote:The more oxygen atoms there are, the stronger the acid.


Why?

emilyyribarren1k
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Re: Sapling #12

Postby emilyyribarren1k » Wed Dec 09, 2020 2:32 pm

viewtopic.php?f=53&t=24810&p=73966&hilit=Why+acids+stronger+when+greater+oxygen+attached+central&sid=a0cd8b26ffb01fb9ac472ebba06f717f#p73966

I found this old post and I think this helps answer the question. It seems like the additional oxygen atoms are pulling the hydrogen from the oxygen that it formed the O-H bond with, making it weaker. I think that just because there are more O doesn't mean the H is held more tightly because that H can only form a bond with (be held by) one of the O atoms.


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