Lab 2 - Titration of Amino Acid

Question 1

Equilibrium

Answer 1

When the concentration of both components becomes constant

Question 2

When the concentration of both components become constant

Answer 2

Equilibrium

Question 3

Dynamic Equilibrium

Answer 3

The rates of the forward and backward reactions are identical

Question 4

The rates of the forward and backward reactions are identical

Answer 4

Dynamic Equilibrium

Question 5

Dissociation

Answer 5

Reactions in which a compound or ion breaks up in a solvent into 2 or more units, at least one of which is an ion

Question 6

Reactions in which a compound or ion breaks up in a solvent into 2 or more units, at least one of which is an ion

Answer 6

Dissociation

Question 7

AKA Ionization

Answer 7

Dissociation

Question 8

Ionization Constant

Answer 8

Equilibrium Constant

Keq=Ki=[H+][A-}/[HA]

Question 9

pH

Answer 9

degree of acidity, that is the hydrogen concentration in moles per liter

Question 10

Hydrogen concentration in moles per liter

Answer 10

pH

Question 11

pH formula

Answer 11

pH=-log[H+]

Question 12

Dissociation of Weak Acids

Answer 12

An acid liberates protons to a medium. A base will combine with a proton.

Question 13

Buffers

Answer 13

Contain substances which offer the ability to resist pH changes

Question 14

Contain substances which offer the ability to resist pH changes

Answer 14

Buffers

Question 15

Titrations

Answer 15

Stepwise addition of a standardized base or acid to a solution

Question 16

Stepwise addition of a standardized base or acid to a solution

Answer 16

Titrations

Question 17

pKa

Answer 17

Tells us how acidic a Hydrogen atom in a molecule is

Question 18

pKa on a graph

Answer 18

Point at which [acid] = [base]

Midpoint on a graphed line

Question 19

Tells us how acidic a Hydrogen atom in a molecule is

Answer 19

pKa

Question 20

Isoelectric point

Answer 20

pI

Question 21

pI

Answer 21

Isoelectric point, the pH at which a particular molecule carries no net electrical charge

Question 22

pI on a graph

Answer 22

(pK1 + pK2)/2 = pI

pK1 is to the left and pK2 is to the right of the graph

Question 23

Purpose of Titration

Answer 23

Allows you to find the concentration of a known amount of an unknown acid or base by using another acid or base whose volume you already know

Question 24

Titration Curve graph

Answer 24

x-axis = Volume
y-axis = pH