Lab 11 Acid - Base Titrations Parts 1 And 2

Question 1

What does HCL react with?

Answer 1

Reacts with NaOH in a 1:1 stoichiometric ratio
HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)

Question 2

What concentration is most commonly determined by conducting a titration

Answer 2

Analyte

Question 3

What can be determined by using an acid-base indicator?

Answer 3

Equivalence point

Question 4

Analyte

Answer 4

Is most commonly determined by conducting a titration

Question 5

What does an acid-base indicator do?

Answer 5

Changes color rapidly as the unknown solution goes from acidic to basic

Question 6

What is an equivalence point?

Answer 6

Is reached when the number of moles of standard added equals the number of moles unknown

Question 7

What does KHP react with?

Answer 7

Reacts with NaOH in a 1:1 stoichiometric ratio

HC8H4O4−(aq) + OH−(aq) → C8H4O42−(aq) + H2O(l)

Question 8

What is an endpoint?

Answer 8

Point at which the indicator changes color

Question 9

What is titration

Answer 9

A standard of known concentration is added in a controlled manner to a specific volume of an unknown in order to determine the equivalence point

Question 10

Hydrochloric acid (unknowns)

Answer 10

Corrosive to skin and mucous membranes
Can cause serious eye damage

Question 11

What are the three primary standards for standardizing solutions of base?

Answer 11

High purity
Large formula weight
Water soluble

Question 12

What is the critical aspect of a titration?

Answer 12

To select an indicator so that the endpoint and equivalence point occur simultaneously

Question 13

Potassium hydrogen phthalate (KHP)

Answer 13

Toxicity from ingestion

Question 14

Sodium hydroxide 0.10 M

Answer 14

Corrosive to skin
Can cause serious eye damage
As always you must wear your goggles at all times

Question 15

Phenolphthalein indicator

Answer 15

Flammable liquid
Acute toxicity from ingestion

Question 16

What is KHP

Answer 16

Potassium hydrogen phthalate
Primary standard for standardizing solution of base (high purity, large formula weight, water soluble)

Question 17

What type of concentration is used to determine the equivalence point?

Answer 17

Titration

Question 18

What type of concentration is used to determine the equivalence point?

Answer 18

Titration

Question 19

Reacts with NaOH in a 1:1 stoichiometric ratio
HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)

Answer 19

What does HCL react with?

Question 20

Analyte

Answer 20

What concentration is most commonly determined by conducting a titration

Question 21

Equivalence point

Answer 21

What can be determined by using an acid-base indicator?

Question 22

Is most commonly determined by conducting a titration

Answer 22

Analyte

Question 23

Changes color rapidly as the unknown solution goes from acidic to basic

Answer 23

What does an acid-base indicator do?

Question 24

Is reached when the number of moles of standard added equals the number of moles unknown

Answer 24

What is an equivalence point?

Question 25

Reacts with NaOH in a 1:1 stoichiometric ratio HC8H4O4−(aq) + OH−(aq) → C8H4O42−(aq) + H2O(l)

Answer 25

What does KHP react with?

Question 26

Point at which the indicator changes color

Answer 26

What is an endpoint?

Question 27

A standard of known concentration is added in a controlled manner to a specific volume of an unknown in order to determine the equivalence point

Answer 27

What is titration

Question 28

Corrosive to skin and mucous membranes Can cause serious eye damage

Answer 28

Hydrochloric acid (unknowns)

Question 29

High purity Large formula weight Water soluble

Answer 29

What are the three primary standards for standardizing solutions of base?

Question 30

To select an indicator so that the endpoint and equivalence point occur simultaneously

Answer 30

What is the critical aspect of a titration?

Question 31

Toxicity from ingestion

Answer 31

Potassium hydrogen phthalate (KHP)

Question 32

Corrosive to skin Can cause serious eye damage As always you must wear your goggles at all times

Answer 32

Sodium hydroxide 0.10 M

Question 33

Flammable liquid Acute toxicity from ingestion

Answer 33

Phenolphthalein indicator

Question 34

Potassium hydrogen phthalate Primary standard for standardizing solution of base (high purity, large formula weight, water soluble)

Answer 34

What is KHP

Question 35

Titration

Answer 35

What type of concentration is used to determine the equivalence point?

Question 36

Titration

Answer 36

What type of concentration is used to determine the equivalence point?