Acids

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Emma Scholes 1L
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Joined: Fri Sep 28, 2018 12:18 am

Acids

Postby Emma Scholes 1L » Wed Jan 16, 2019 12:10 pm

How can you tell what is a weak acid vs. what is a strong acid?

Dimitri Speron 1C
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Re: Acids

Postby Dimitri Speron 1C » Wed Jan 16, 2019 12:17 pm

A strong acid dissociates completely in water, or at least so much that it is practically completely. Mathematically, this means that the Ka (acidity constant) is infinitely large. For weak acids the acidity constant will be less that 10^-3. This means that not all of the acid is dissociating in water, as such the concentration of hydronium does not increase as much as it does for a strong acid. The exact same stuff is all true for bases as well.

megan blatt 2B
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Joined: Fri Sep 28, 2018 12:28 am

Re: Acids

Postby megan blatt 2B » Wed Jan 16, 2019 12:23 pm

A weak acid does not fully dissociate in water and therefore, would require an equilibrium equation. A strong acid fully dissociates in water and so it would be written as just a forward reaction. You just have to memorize the strong acids and every other acid is a weak acid. The strong acids are HCl, HNO3, H2SO4, HBr, HI, HClO4, HClO3.

davidryan3f
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Re: Acids

Postby davidryan3f » Wed Jan 16, 2019 5:03 pm

A weak acid or base does not dissociate fully while a strong acid or base does indeed dissociate fully ion the solution.

705192887
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Joined: Fri Sep 28, 2018 12:18 am

Re: Acids

Postby 705192887 » Wed Jan 16, 2019 5:08 pm

Strong acids and bases disassociate/ionize completely while weak acids and bases do not completely. this is the main difference.

Miya Lopez 1I
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Re: Acids

Postby Miya Lopez 1I » Wed Jan 16, 2019 5:10 pm

megan blatt 2B wrote:A weak acid does not fully dissociate in water and therefore, would require an equilibrium equation. A strong acid fully dissociates in water and so it would be written as just a forward reaction. You just have to memorize the strong acids and every other acid is a weak acid. The strong acids are HCl, HNO3, H2SO4, HBr, HI, HClO4, HClO3.


What are some strong bases that we should know of?

Erin Kim 2G
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Joined: Fri Sep 28, 2018 12:26 am

Re: Acids

Postby Erin Kim 2G » Wed Jan 16, 2019 5:28 pm

The strong acids include HCl, HNO3, H2SO4, HBr, HI, HClO4, and HClO3.
The strong bases include LiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)2, Sr(OH)2, and Ba(OH)2.


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