TOPIC 5: Alkalimetry and Acidimetry

Question 1

Principles of Acid-base Tritimetry

Answer 1

• Types of Titration based on the number of Volumetric Solution
- Direct Assay
- Residual Assay

• Blank Determination

Question 2

Used to monitor the reaction.

Answer 2

pH indicator

Question 3

This reaction usually occurs between acid and base, hydroxide ions and hydrogen protons, resulting in the formation of water.

Answer 3

Neutralization

Question 4

This reactions are chemical processes whereby an amount of an acid has reacted with an equivalent amount of a base with the production of salt and water.

Answer 4

Neutralization

Question 5

The measurement of basic in substances by titration with a standard acid.

Answer 5

Acidimetry

Question 6

Involves the determination of acidic substances by titration with a standard base solution.

Answer 6

Alkalimetry

Question 7

In Acid-Base Reaction,

Titrant + Analyte =

Answer 7

Salt and Water

Question 8

An ______ is any substance which in water ionizes to give hydrogen ions (hydronium ions*).

Answer 8

Acid

Question 9

A _____ is any substance which in water ionizes to give hydroxyl ions.

Answer 9

Base

Question 10

Use WATER as the solvent for dissolving the analyte samples for the titration.

Answer 10

Aqueous titrimetry

Question 11

Use ORGANIC SOLVENTS for dissolving the sample.

Answer 11

Non-aqueous titrimetry

Question 12

Strong Acid + Strong Base:

Answer 12

Phenolphthalein, methyl red, methyl orange

Question 13

Weak Acid + Strong Base:

Answer 13

Phenolphthalein

Question 14

Strong Acid + Weak Base:

Answer 14

Methyl red

Question 15

Weak Acid + Weak Base:

Answer 15

No indicator

Question 16

Weak Base + Salt:

Answer 16

Crystal violet, Quinaldine red, malachite green

Question 17

Relatively Strong Base:

Answer 17

Methyl red, methyl orange

Question 18

Weak acid:

Answer 18

Azo-violet, o-nitro-aniline (very WA)

Question 19

Strong Acid:

Answer 19

Thymol blue

Question 20

Burette used in Bases

Answer 20

Mohr’s Burette
(Rubber Tube + Pinchcock)

Question 21

Burette used in Acids

Answer 21

Geissler’s Burette
(Glass Stopper)

Question 22

Types of Titration Based On The Number of Volumetric Solution

Answer 22

Direct
Residual / Back Titration

Question 23

Titrant is added into the analyte until chemical equivalent amounts of them reacts together.

Answer 23

Direct Titration

Question 24

Described as the amount of volumetric solution in excess. The excess is back titrated with another volumetric solution.

Answer 24

Residual / Back Titration

Question 25

ONLY 1 VOLUMETRIC SOLN/STD, SOLUTION

Answer 25

Direct Titration

Question 26

USES 2 VOLUMETRIC SOLN.

Answer 26

Residual Titration

Question 27

❖ Volatile

❖ Sample is insoluble in water

❖ Reaction with standard solution is slow

❖ Sample does not give a distinct endpoint with an indicator by direct titration (No sharp endpoint)

Answer 27

Residual Titration

Question 28

Carried in the same manner as the actual test BUT without the sample.

Answer 28

Blank Test