Knowing strong acids and bases

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Adam Kramer 1A
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Joined: Sat Aug 24, 2019 12:15 am

Knowing strong acids and bases

Postby Adam Kramer 1A » Sat Dec 07, 2019 1:28 pm

At one of the reviews, the UA said to memorize the strong acids, but do we also need to memorize strong bases? How can we tell if it is a strong base or acid if we don't specifically memorize them?

Lauren Stack 1C
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Joined: Sat Aug 17, 2019 12:18 am

Re: Knowing strong acids and bases

Postby Lauren Stack 1C » Sat Dec 07, 2019 1:34 pm

I believe it is helpful to memorize the seven strong acids which are (HBr, HCl, HI, HNO3, HClO4, HClO3, and H2SO4). For strong bases, they are Group 1 hydroxides, alkaline earth metal hydroxides (Ca(OH)2, Sr(OH)2, Ba(OH)2), and Group 1/Group 2 Oxides. This is all summarized in table J.1 of our textbook (page F75). Knowing the rules for the strong bases can help you identify them, rather than complete memorization.

Aarja Pavade 1H
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Joined: Sat Aug 17, 2019 12:18 am

Re: Knowing strong acids and bases

Postby Aarja Pavade 1H » Sat Dec 07, 2019 1:41 pm

Also, memorizing the strong acids and bases will help you recognize which acids and bases will be weak and not completely disassociate, as they will just be any acid/base that is not strong.

005162520
Posts: 101
Joined: Tue Sep 24, 2019 12:17 am

Re: Knowing strong acids and bases

Postby 005162520 » Sat Dec 07, 2019 6:00 pm

What are some examples of group one and group 1 and group 2 oxoacids?

Jordan Ziegler 2J
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Joined: Sat Aug 17, 2019 12:15 am

Re: Knowing strong acids and bases

Postby Jordan Ziegler 2J » Sat Dec 07, 2019 9:49 pm

I don't think elements from groups 1 and 2 form oxoacids. Alkali metals and alkali earth metals form cations (which are electropositive) and are more likely to be bonded to a hydroxide group, which is basic.

Generally, nonmetals will form oxoacids. Examples of these include the strong acids H2SO4 (sulfuric acid), ClO4 (perchloric acid), and HNO3 (nitric acid).

Jamie Hwang 2F
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Joined: Thu Jul 25, 2019 12:16 am

Re: Knowing strong acids and bases

Postby Jamie Hwang 2F » Sun Dec 08, 2019 1:29 am

005162520 wrote:What are some examples of group one and group 1 and group 2 oxoacids?


Li2O and MgO are oxoacids.

Anna Heckler 2C
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Joined: Wed Sep 18, 2019 12:18 am

Re: Knowing strong acids and bases

Postby Anna Heckler 2C » Sun Dec 08, 2019 1:33 am

While it is helpful to memorize the strong acids, strong bases can be identified by all cations (bound to OH-) in group 1 and some of group 2.

Nicoli Peiris 1B
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Joined: Wed Sep 30, 2020 10:02 pm

Re: Knowing strong acids and bases

Postby Nicoli Peiris 1B » Mon Dec 07, 2020 12:41 pm

group one and two metals form strong bases when with hydroxides and oxides.

Nandhini Ekambaram 1L
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Joined: Wed Sep 30, 2020 9:58 pm

Re: Knowing strong acids and bases

Postby Nandhini Ekambaram 1L » Mon Dec 07, 2020 12:46 pm

Adam Kramer 1A wrote:At one of the reviews, the UA said to memorize the strong acids, but do we also need to memorize strong bases? How can we tell if it is a strong base or acid if we don't specifically memorize them?


Yes I think it's best to memorize the strong bases and strong acids, so you know if anything else is given it's weak. There is a list on Sapling:

Strong Acids:
HCl

HBr

HI

H2SO4

HNO3

HClO4

HClO3*

Strong bases:

LiOH

NaOH

KOH

RbOH

CsOH

Ca(OH)2

Sr(OH)2

Ba(OH)2


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