Acids and Bases Flashcards
Memorize for Test 2
What is the name of this strong acid?
HClO4 (aq)
perchloric acid
What is the name of this strong acid?
HCl (aq)
hydrochloric acid
What is the name of this strong acid?
HBr (aq)
hydrobromic acid
What is the name of this strong acid?
HI (aq)
hydroiodic acid
aka hydriodic acid
What is the name of this strong acid?
HNO3 (aq)
nitric acid
What is the name of this strong acid?
H2SO4 (aq)
sulfuric acid
What is a strong acid, and what does it do in water?
- Strong electrolyte that completely dissociates in water. (6 of them, PCBINS.)
- If you see a strong acid, break it up into ions. Step by step if multiprotic.
- Driving force is strong, just a forward reaction.
- This is what an ionization reaction looks like for H2SO4 (aq).
H2SO4 (aq) –> H+ (aq) + HSO4- (aq)
HSO4- –> H+ (aq) + SO42- (aq)
Overall reaction: H2SO4 –> 2H+ (aq) + SO42- (aq)

What is a strong base?
- Soluble metal hydroxides.
- Completely dissociate in water.
- 8 of them. (5 in Group 1A starting with Lithium, 3 in Group 2A starting with Calcium).
- Lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide
- Calcium hydroxide, strontium hydroxide, barium hydroxide

Name this strong base
LiOH
lithium hydroxide
Name this strong base
NaOH
sodium hydroxide
Name this strong base
KOH
potassium hydroxide
Name this strong base
RbOH
rubidium hydroxide
Name this strong base
CsOH
cesium hydroxide
Name this strong base
Ca(OH)2
(has a 2 because group IIA)
calcium hydroxide
Name this strong base
Sr(OH)2
(has a 2 because group IIA)
strontium hydroxide
Name this strong base
Ba(OH)2
(has a 2 because group IIA)
barium hydroxide
What are the six strong acids?

Hint: PCBINS
Perchloric: HCLO4
Hydrochloric: HCL
Hydrobromic: HBR
Hydroiodic: HI
Nitric: HNO3
Sulfuric: H2SO4
What are the 8 strong bases?
- Metal hydroxides.
- Hint: 5 in Group 1A, 3 in Group IIA.
- Sodium hydroxide NaOH is especially popular because it is cheap and soluble.

What are weak acids?
- They only partially dissociate.
- Write them as molecules.
- Driving force for a weak acid is weak. Put double arrow ⇄
- What you get if you fully protonate acetate, carbonate, phosphate, and flouride.
- Hint: Actually Can Protonate Further.
- Acetic, Carbonic, Phosphoric, hydroFluoric
- Consider anything that isn’t a strong acid a weak acid

What are weak bases?
- The only weak base we need to know is ammonia, NH3.
- Double arrows ⇄
- NH3 (aq) + H2O (l) <==> NH4+ (aq) + OH¯ (aq)
How do you name binary acids?
(Binary acid = hydrogen combined with a second nonmetallic element.)
- “hydro”-nonmetal stem-“ic” acid
- Nonmetal stems: fluor, chlor, brom, iod etc
- Examples:
- hydriodic acid: HI (strong)
hydrobromic acid: HBr (strong)
hydrochloric acid: HCl (strong)
* hydrofluoric acid: HF (weak) * hydrosulfuric acid: H<sub>2</sub>S (weak) * Hint: acids containing ions ending with ide often become hydro----ic acid.

What are oxoacids and how do you name them?
- They have H + O + something else
- Suffix depends on #O atoms. The acid corresponds with the polyatomic anion.
- Acids containing ions ending with ate become -ic acid. Acids containing ions ending with ite usually become -ous acid.
- Ate with ic, ite with ous. (Hint: Attic.)
- If you have one fewer or one more, add prefix hypo (lowest #) or per (the most).

What are acid salts, and how do you name them?
- Forms if an acid and a base are not fully neutralized, not 1:1.
- They are the salts of an acid and base that didn’t fully neutralize (ex: weak acid, strong base). They are neutral and have a cation that is not hydrgogen, but they also have a hydrogen they could give. (Ex: NaHCO3)
- Name acid salts based on how many hydrogens there are that could still be neutralized. Ex:
- NaHCO3 sodium hydrogen carbonate (also known as sodium bicarbonate)
NaHSO3 sodium hydrogen sulfite (also known as sodium bisulfite)
KH2PO4 potassium dihydrogen phosphate
* When they dissociate, the first step will be one arrow. Second step double arrows, because the next part is weak.
What is the acid-base behavior of oxides?
-
Nonmetal oxides can be acids
- ex: CO2 combined with water is carbonic acid. CO2(aq) + H2O(s) → H2CO3 (aq)
-
Metal oxides combined with water are bases
- CaO(s) + H2O(s) → Ca(OH)2(aq)
What happens when a STRONG ACID reacts with a STRONG BASE?
- Formation of water and a salt
- Ex: NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
- Net ionic equation: H+(aq) + OH-(aq) –> H2O.
- Formation of water is a strong driving force, single arrow
- Neutral solution if 1:1 ratio of moles
- Net ionic equation: H+(aq) + OH-(aq) –> H2O.
What happens when a STRONG ACID reacts with a WEAK BASE?
- Resulting solution is slightly acidic, with slightly acidic salt.
- Always think of a strong acid reacting with the weak base Ammonia. It is a proton transfer.
- The driving force is to create molecule. Ex:
Molecular: HNO3 (aq) + NH3 (aq) –> NH4NO3 (aq) (which is a salt)
Full ionic: H+ (aq) + NO3- (aq) + NH3 (aq) –> NH4+ (aq) + NO3- (aq)
Net ionic: H+ (aq) + NH3(aq) –> NH4+ (aq)
What happens when a WEAK ACID reacts with a STRONG BASE?
- Formation of a salt and water
- Same category of products as strong + strong, but the resulting solution is not neutral, it’s a slightly basic solution with a basic salt.
- Example with Pam’s favorite weak acid, acetic acid:
- Molecular: 2HC2H3O2 (aq) + Ca(OH)2 (aq) –> Ca(C2H3O2)2 (aq) + 2H2O (l)
Full ionic: don’t break up acetic acid, it’s weak. 2HC2H3O2 (aq) + Ca2+ (aq) + 2OH- (aq) –> Ca2+ (aq) + 2C2H3O2- ( aq) + 2H2O (l)
* Net ionic: get rid of spectators and simplify. HC<sub>2</sub>H<sub>3</sub>O<sub>2</sub> (aq) + OH- (aq) --\> C<sub>2</sub>H<sub>3</sub>O<sub>2</sub><sup>- </sup>(aq) + H<sub>2</sub>O (l)
What happens when a WEAK ACID reacts with a WEAK BASE?
- Weak acid plus weak base (NH3) forms ammonium plus the anion
- Write: Double arrow because we don’t have strong driving force, and they’re both weak.
- Molecular: CH3COOH (aq) + NH3 (aq) ⇄ NH4CH3COO (aq)
- Full ionic: Don’t break up the first two because weak. Ammonium acetate does break up because it’s a strong electrolyte, a salt of ammonium.
CH3COOH (aq) + NH3 (aq) ⇄ NH4+ (aq) + CH3COO- (aq)