Chemical Formula

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Eryn Wilkinson 3H
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Chemical Formula

Postby Eryn Wilkinson 3H » Wed Nov 29, 2017 7:58 pm

How do you identify whether it is an acid or a base just by looking at the chemical formula?

Rebecca Cheung 1E
Posts: 20
Joined: Fri Sep 29, 2017 7:04 am

Re: Chemical Formula

Postby Rebecca Cheung 1E » Wed Nov 29, 2017 8:06 pm

If it's a metal it's a base. If it's a nonmetal it's an acid. For example, KOH and NaOH are bases because they contain alkaline earth metals. HBr and HCl are acids because they contain nonmetals.

Jean Mok 3K
Posts: 22
Joined: Sat Jul 22, 2017 3:01 am

Re: Chemical Formula

Postby Jean Mok 3K » Wed Nov 29, 2017 11:33 pm

If the molecule is made with a metal element, then it's a base. If the molecules is made a nonmetal element, it's an acid. You can also see if there are Hydronium ions being produced or hydroxide ions being produced.

Kevin Liu 3G
Posts: 28
Joined: Fri Sep 29, 2017 7:07 am

Re: Chemical Formula

Postby Kevin Liu 3G » Fri Dec 01, 2017 3:51 pm

It's also helpful to remember that generally acids start with an H or end with -COOH while bases generally end with -OH. It might not be true for everything but is for most things I have encountered.

RussellChin_3A
Posts: 42
Joined: Sat Jul 22, 2017 3:01 am

Re: Chemical Formula

Postby RussellChin_3A » Fri Dec 01, 2017 9:04 pm

A general rule is that if a molecule contains OH, it is considered a base. If a molecule has an H attached to it, it is generally an acid. Another way to identify if it is an acid or base is to identify the bronsted lowry acid and base by keeping track of the transfer of protons during the reaction.

Troy Tavangar 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: Chemical Formula

Postby Troy Tavangar 1I » Thu Dec 07, 2017 11:41 pm

Generally, if the molecule contains a nonmetal, it is an acid. Inversely, if the molecule contains a metal, it is generally a base.


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