Acids Vs. Bases

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Ben 1B
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Joined: Sat Aug 17, 2019 12:16 am

Acids Vs. Bases

Postby Ben 1B » Sun Dec 01, 2019 5:47 pm

What are the keys to distinguishing if a molecule is an acid or base?

Michelle Shin 4B
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Joined: Thu Jul 25, 2019 12:17 am

Re: Acids Vs. Bases

Postby Michelle Shin 4B » Sun Dec 01, 2019 5:54 pm

Acids donate H+ ions(proton) and bases accept H+. Bases also produce OH- while acids produce H+. If you compare the hydrogens before and after a reaction, you can tell if the substance is an acid (decrease H+ =acid) or a base (increase=base).

Arvind 4G
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Re: Acids Vs. Bases

Postby Arvind 4G » Sun Dec 01, 2019 8:47 pm

Acids donate protons and bases receive protons, and acids dissociate and increase the H+ concentration whereas bases dissociate and the increase the OH- concentration

Sofia Barker 2C
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Re: Acids Vs. Bases

Postby Sofia Barker 2C » Sun Dec 01, 2019 9:48 pm

When looking at a reaction, identify which reactant accepts a hydrogen ion / proton and which reactant donates said hydrogen ion / proton. The molecule accepting the ion / proton is considered a base, whereas the molecule donating the ion / proton is considered an acid. For example, water would be considered an acid if it becomes OH- following a reaction because it has donated an H+. Water would be considered a base if it becomes H3O+ following a reaction because it has accepted an H+.

jvera4b
Posts: 60
Joined: Wed Sep 11, 2019 12:17 am

Re: Acids Vs. Bases

Postby jvera4b » Sun Dec 01, 2019 10:09 pm

(Bronstead) acids are proton donors while (brontead) bases are proton acceptors.

Sreyes_1C
Posts: 75
Joined: Fri Sep 28, 2018 12:19 am

Re: Acids Vs. Bases

Postby Sreyes_1C » Sun Dec 01, 2019 10:13 pm

https://www.khanacademy.org/science/org ... sted-lowry

I found this video to be helpful with distinguishing the two

Kevin Liu 1J
Posts: 53
Joined: Thu Jul 25, 2019 12:16 am

Re: Acids Vs. Bases

Postby Kevin Liu 1J » Sun Dec 01, 2019 10:20 pm

H+ concentration is the key to differentiating acids and bases as this provides the basis to determining the pH of the substance.
pH < 7 is acidic
pH > 7 is basic

504939134
Posts: 88
Joined: Wed Sep 18, 2019 12:21 am

Re: Acids Vs. Bases

Postby 504939134 » Sun Dec 01, 2019 10:54 pm

I like to remember that if it is an acid it will donate protons, it is a proton donator. If it is a base it will be a proton acceptor.

Natalie C 1K
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Re: Acids Vs. Bases

Postby Natalie C 1K » Sun Dec 01, 2019 11:13 pm

acids donate protons, while bases accept protons

505306205
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Joined: Thu Jul 25, 2019 12:15 am

Re: Acids Vs. Bases

Postby 505306205 » Sun Dec 01, 2019 11:18 pm

Acid and Base classification differs depending on whether you are discussing Arrhenius, Bronsted, or Lewis acids and bases. Arrhenius acids form H+ ions in water, while bases form OH- ions in water. Bronsted acids donate protons while Bronsted bases accept protons. Lewis acids accept electron pairs and Lewis bases donate electron pairs.

Shail Avasthi 3C
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Re: Acids Vs. Bases

Postby Shail Avasthi 3C » Mon Dec 02, 2019 10:25 am

Acids typically lose H+ while bases typically gain them.

SVajragiri_1C
Posts: 91
Joined: Thu Jul 11, 2019 12:16 am

Re: Acids Vs. Bases

Postby SVajragiri_1C » Mon Dec 02, 2019 11:05 am

The most general difference is that an acid gives off hydrogen ions in water, whereas bases give of hydroxide ions in water. If you are talking about Lewis acids and bases, however, then the difference is that Lewis acids accept electrons from other molecules, while Lewis bases donate electrons to other molecules (the best way to determine this is to simply look at the charge of the Lewis structure).


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