Types and strength of Acids/Bases

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AlyssaPeckham1A
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Joined: Fri Sep 29, 2017 7:04 am

Types and strength of Acids/Bases

Postby AlyssaPeckham1A » Wed Dec 06, 2017 7:11 pm

Could someone elaborate on strong/ weak acids and bases and give examples for them? Also, how do we determine the type of a certain acid/base?

Mike Vinci 2B
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Re: Types and strength of Acids/Bases

Postby Mike Vinci 2B » Wed Dec 06, 2017 11:55 pm

A weak acid dissociates incompletely, releasing some of its hydrogen atoms into a solution. It isn't as likely to donate protons. A strong acid will fully dissociate in water to form H+ ions. Strong bases dissociate fully into OH-, but weak bases only partially dissociate into OH-.Strong acids include HCL, HI, HBr, and weak acids include H2SO3 and HF. Strong bases can be NaOH, LiOH, and KOH. Weak bases include NH3 and CH3NH2.

Morgan Baxter 1E
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Joined: Thu Jul 27, 2017 3:00 am

Re: Types and strength of Acids/Bases

Postby Morgan Baxter 1E » Thu Dec 07, 2017 12:11 am

In high school, I learned that these were the strong acids, and then you could assume that the rest are weak acids, since it is much more common for something to be a weak acid than a strong one.

Strong acids:
HClO4
HClO3
HCl
HBr
HI
HNO3
H2SO4

Kyle Alves 3K
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Joined: Thu Jul 27, 2017 3:01 am

Re: Types and strength of Acids/Bases

Postby Kyle Alves 3K » Sat Dec 09, 2017 11:22 pm

Also in an equation solving with weak acids and bases, its set up either:
for a weak acid: HA + H2O = H3O+ + A- where A is the shorthand for acid, to solve for Ka, or the acidity constant
for a weak base: A- + H2O = OH- + HA where A is the shorthand for base, to solve for Kb, or the basicity constant

A lower calculated Ka means more acidic
A high calculated Kb means more basic


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