. Salts are formed as a product in an acid-base ________________________ reaction. Salts are ionic compounds that contain a ___________________ and ________________________.
What is neutralization,positive ion and negative ion.
100
Define buffers
What is as solutions that resist changes in pH when a small amount of acid, base or water is added. A buffer is a mixture of a weak acid, or a weak base with its salt (which contains its conjugate pair). Thus, an acidic buffer is made by mixing a weak acid together with the salt of that acid and a strong base.
100
Define an amino acid
What is Amino acids contain both an amine and a carboxylic acid functional group
200
A conjugate acid base pair
What is HA and A-
200
Define the term acid base indicators
What is are substances that change color when the [H+(aq)] changes.
Litmus shows acids as pink and alkalis as blue.
200
For 0.001M solutions of each of the following put them in order of increasing pH.
0.001M SA, 0.001M SB, 0.001M WA, 0.001M WB
What is
0.001M SA, 0.001M SB, 0.001M WA, 0.001M WB
#1 #4 #2 #3
200
Naming carboxylic acids:
What is parent alkane + ‘-oic acid’
300
Species that act as an acid and a base are called
What is amphoteric?
300
Acids react with these three to form salt
What is Acids in dilute aqueous solutions react with metals, bases and carbonates to form salts:
300
Identify each of the following as a strong acid (SA), strong base (SB), weak acid (WA) or weak base (WB).
NaCN HCN HNO3 NaOH
What is NaCN =WB, HCN =WA, HNO3 =SA, NaOH =SB
300
Example of a buffer : ethanoic acid and sodium ethanoate
Define the general formula
What is
NaOH(aq) + CH3COOH(aq) NaCH3COO(aq) + H2O(l)
+ CH3COOH(aq)
Limiting reagent excess acid salt of weak acid excess weak acid
300
Naming amines
What is : aminoalkane
400
In a conjugate pair the acid always has one proton more than its conjugate base. Thus, consider the general acid-base equation where a generic acid HA and base B:
What is HA + B A- + BH+
400
Sate the general formula when an acid reacts with carbonates:
What is Acid + carbonate salt + water + carbon dioxide
400
Identify the formula for the strong base
CH3COOH
What is CH3COO-1
400
Which of the following pairs of compounds could create a suitable buffer system?
a sodium acetate and acetic acid
b sodium chloride and sodium hydroxide
c carbonic acid and sodium chloride
d sodium sulfate and sodium hydroxide
e ammonia and potassium hydroxide
What is a?
400
Name this compound; CH3NH2
What is amino methane or methlyamine?
500
Identify the 3 theories
What is Arrhenius (Ionic theory) – an acid produces hydrogen ions, H+(aq), and a base produces hydroxide ions,
OH- (aq), in aqueous solutions.
Bronsted-Lowry- an acid donates a proton (H+) and a base accepts a proton (H+).
Lewis – an acid is an electron pair acceptor and a base is an electron pair donor.
500
State the general formula when acids react with metals:
What is Acid + metal salt + hydrogen
- 2HA(aq) + 2M(s) 2MA(aq) + H2(g)
500
In the reaction below, identify the acid, base, conjugate acid and conjugate base
What is NH3 + HCl NH4+ + Cl-
a b ca cb
500
Suppose that 0.250 liters of a buffer solution that contains 0.225 M acetic acid and 0.225 M sodium acetate. What would be the pH change if 30.0 mL of 0.100 M HCl is added to this buffer? Assume volumes are additive. Ka for acetic acid is 1.8 x 10 -5.
a 5.40 to 7.68
b 6.40 to 4.56
c 4.74 to 4.82
d 4.74 to 4.70
e 4.70 to 4.78