Unit 8 Acid Bases And Buffers Flashcards
When an anion ends in “ide” what is the suffix?
For what state of the compound?
-ic acid
Aqueous compounds
When an anion ends in “ate” what is the suffix?
For what state of the compound?
-ic acid
Aqueous compounds
When an anion ends in “ite” what is he suffix?
For what state of the the compound?
-ous acid
Aqueous compounds
What are the two exception to naming hydrogen and an anion?
Sulfur compounds - uric acid
Phosphorous compounds - oric acid
What is an Arrhenius acid?
A substance that produces H+ ions in aqueous solutions
What the first type of reaction of acids and their properties?
1) Neutralization reaction with bases
a) with hydroxides to for salt and water
b) with metal oxides to form a salt and water
c) with ammonia to form a salt
What is the second type of reaction of acids and their properties?
2) Replacement reaction with reactive metals to form a salt and hydrogen gas
What is the third type of reaction of acids and their properties?
3) Carbonates and bicarbonates react to form a salt, carbon dioxide and water
With the indicator litmus, what will be the colour in acid and base?
Acid: Red
Base: Blue
With the indicator phenolphthalein, what is the colour in acid and base?
Acid: Colourless
Base: Pink
With the indicator methyl orange, what is the colour in acid and base?
Acid: Red
Base: Yellow
With the indicator bromothymol blue, what is the colour in acid and base?
Acid: Yellow
Base: Blue
With the indicator phenol red, what is the colour in acid and base?
Acid: Yellow
Base: Red
With the indicator bromocresol green, what is the colour in acid and base?
Acid: Yellow
Base: Blue
With the indicator methyl red, what is the colour in acid and base?
Acid: Red
Base: Yellow
What is an acid?
A compound that gives a proton (H^+) on the reactant side.
What is a base?
A compound that receives a proton on the reactant side
What is a conjugate acid?
A compound that gives a proton (H^+) on the product side
What is a conjugate base?
A compound that receives a proton on the product side
What is an Arrhenius base?
A substance that can neutralize an acid in an aqueous solution
What is the Universal indicator a mixture of?
methyl orange, methyl red, bromothymol blue and phenolphthalein
When is a solution considered acidic?
When the solution has a pH < 7
When is a solution considered alkaline?
When the solution has a pH > 7
When is a solution considered neutral?
When the solution has a pH = 7
What does pH stand for?
power of hydrogen
What is the characteristic of a strong acid?
Strong acids completely dissociate
What is the characteristic of a weak acid?
Weak acids partially dissociate
What does monoprotic mean?
one proton/hydrogen
What is the formula to find pH?
pH = -log[H^+]
What is the value of kw at room temperature? And what is room temperature?
1.00*10^-14 M^2
Room temperature 298K
What is the formula to find the hydrogen concentration?
log^-1 (-pH) = [H^+]
What are the four possibilities for the pH of a salt solution?
1) strong acid + strong base
2) weak acid + strong base
3) strong acid + weak base
4) weak acid + weak base
What is a buffer?
A buffer is a solution that contains a weak acid and a salt containing an anion [A^-] in about equal concentrations
How do you prepare a buffer?
Combine a weak acid and its salt
What are the factors that the pH of a buffer depend on?
- Ratio of acid to salt
- Ka of the weak acid
What is buffer capacity?
The amount of acid/base that can be added before the pH changes significantly
What is the name of H3PO4?
Phosphoric acid
What is the name of this acid H2SO4?
Sulfuric acid
What is the characteristic of a base?
Most bases contain cation usually positively charged metal ion and a hydroxide
What is the characteristic of an acid?
All acids consist of a base and an anion
What are the types of Acid and Bases definitions?
Arrhenius
Brønsted-Lowry
What are the factors that affect [H^+] of an acid?
Concentration of the acid and the strength of the acid
What are some common strong monoprotic acids? (6)
- HNO3
- HBr
- H I
- HClO4
- HCl
- H2SO4
What are some common monoprotic weak acids?
- HF
- HNO2
- H2O
- CH3COOH
- HCN
At room temperature what is the pH of water?
pH of water at 298K is 7