Lesson 5, Unit 5 Chemistry A: Naming and Writing Formulas for Acids and Bases

Flashcard maker : Lily Taylor
Acids
a compound that contains one or more hydrogen atoms and produces hydrogen ions (H+) when dissolved in water

What is an acid consisted of?
the acid consists of an anion combined with as many hydrogen ions that are needed to make the molecule electrically neutral

All monatomic anions have names ending in -__.
ide

How do you name an acid with an ending of -ide?
Change the -ide to -ic and add the prefix hydro- ….”What we -ate was -ic, but it was -ite with -ous”

Name the acids HCl & H2S.
HCl
Cl-=chloride
So *hydro*chlor*ic* acid

H2S
S2- =sulfide
*hydro*sulfur*ic* acid

When naming acids with anions ending in -ate, what do you do?
You change the -ate to *-ic* & *keep any prefixes the anion* may have.

When naming acids with anions ending in -ite, what do you do?
change -ite to -ous. *keep any prefixes the anion* may have.

Name H2SO4
SO4(charge=2-)=sulfate
sulfuric acid

Name HNO2
NO2(charge=-)=nitrite
nitrous acid

If the hypobromite ion has the formula BrO-, what is the formula for perbromic acid?
BrO-=hydrobromite–>HBrO=hydrobromous acid
BrO2=bromite–>HBrO2=bromous acid
BrO3=bromate–> HBO3=bromic acid
BrO4-=perbromate–>HBrO4=perbromic acid

When the name of the anion ends in -ide, what is the acid names prefix?
hydro-

If the acids name begins with the prefix hydro, what can you guess about the stem of the anions suffix?
-ic

If the anions name ends in -ite, what is the acid names suffix?
-ous

H2SO3
(X=sulfite) sulfurous acid.

If the anion name ends in -ate, what is the acid names suffix?
-ic

HNO3
(X=nitrate) is named nitric acid

Hydrochloric acid
HCl

Sulfuric acid
H2SO4

Nitric acid
HNO3

Acetic acid
CH3COOH

Phosphoric acid
H3PO4

Carbonic acid
H2CO3

Hydrobromic acid
hydrobromic acid (prefix-hydro, suffix-ice) is a combination of hydrogen ion and bromide ion. the formula is HBr

phosphorous acid
hydrogen ion and phosphite ion (PO3) must be the components so. H3PO3.

formic acid
(-ic ending) hydrogen and formate ion (HCOO-). so HCOOH.

The name of an acid begins with the prefix hydro- when the name of the anion ends in -___.
ide

base
ionic compound that produces *hydroxide* ions when dissolved in water

How are bases named?
The name of the cation is followed by the name of the anion.

How do you write the formulas for bases?
Write the symbol for the metal cation followed by the formula for the hydroxide ion.
Balance the ionic charges

Aluminum hydroxide
Al3+
hydroxide=OH-
So you need three hydroxide ions to balance the formula. So the formula is Al(OH)3

Ammonium Hydroxide
ammonium=NH4 with 1+ charge
hydroxide=OH with charge 1-
NH4OH

Bases use the same naming conventions as other ____ compounds.
ionic

The rules for writing the names of acids are used in reverse to write the _______ for acids
formulas

Write the names of these bases.
LiOH
Pb(OH)2
Mg(OH)2
Al(OH)3
Lithium hydroxide
lead(II) hydroxide
Magnesium hydroxide
Aluminum hydroxide

Give the names of these acids.
HNO2
HMnO4
HCN
H2S
HNO2…NO2 is nitrite…. so nitrous acid
HMnO4… MnO4 is permanganate ion…so permanganic acid
HCN… CN is cyanide ion…. so hydrocyanic acid
H2S.. S is sulfide…. so hydrosulfuric acid

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