Do strong acids dissociate completely in water?

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EmilyJoo_1G
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Joined: Thu Jul 25, 2019 12:16 am

Do strong acids dissociate completely in water?

Postby EmilyJoo_1G » Sat Nov 30, 2019 9:48 am

What is the difference between strong and weak acids that make strong acids more likely to completely dissociate?

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Do strong acids dissociate completely in water?

Postby Kayli Choy 2F » Sat Nov 30, 2019 10:36 am

For binary acids (H + an element A), the higher the electronegativity of the element A, the stronger the acid. Acid strengths down a group correlate with bond strength. For oxoacids, the greater the electronegativity of the halogen, the stronger the acid, and the more oxygens attached to the central atom, the stronger the acid.

Louise Lin 2B
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Joined: Sat Aug 17, 2019 12:15 am

Re: Do strong acids dissociate completely in water?

Postby Louise Lin 2B » Sat Nov 30, 2019 1:25 pm

Strong acids have a higher concentration of hydrogen ions than weak acids. This means that for strong acids, all of the hydrogen ions dissociate immediately, while weak acids dissociate more slowly.

EthanPham_1G
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Joined: Sat Jul 20, 2019 12:17 am

Re: Do strong acids dissociate completely in water?

Postby EthanPham_1G » Sat Nov 30, 2019 1:51 pm

Strong acids more easily lose the H+ protons to water. For example, H-I is a strong acid because the bond length between I and H are long and therefore weak; the H+ proton is easily lost. Because of this, the H-I acid dissociates completely in water.
Compare this with H-F which is a weak acid. The H-F bond is short and strong, so it DOES NOT readily give up the H+ proton to water. It does not dissociate completely in water.

Verity Lai 2K
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Joined: Sat Aug 24, 2019 12:18 am

Re: Do strong acids dissociate completely in water?

Postby Verity Lai 2K » Sat Nov 30, 2019 4:12 pm

Strong acids have longer bonds are are usually more electronegative, thus they are more likely to break their bonds and there isn't a very strong force holding the atoms to it compared to elements with smaller radii and higher electronegative values.

Ziyan Wang 3J
Posts: 51
Joined: Wed Sep 18, 2019 12:22 am

Re: Do strong acids dissociate completely in water?

Postby Ziyan Wang 3J » Sun Dec 01, 2019 10:02 am

Yes, you can regard strong acids to dissociate completely.

Sally Qiu 2E
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Re: Do strong acids dissociate completely in water?

Postby Sally Qiu 2E » Sun Dec 01, 2019 10:24 am

yes, strong acids dissociate completely in water. whether or not an acid (or a base) ionizes completely in water depends on the polarity. when there is a significant electronegativity difference, there is less electron density associated with hydrogen and it is easier to ionize

Madeline Phan 1E
Posts: 103
Joined: Sat Aug 17, 2019 12:18 am

Re: Do strong acids dissociate completely in water?

Postby Madeline Phan 1E » Sun Dec 01, 2019 10:29 am

Strong acids do dissociate completely in water, whereas weak acids do not.


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