Prelim - Titration

Question 1

a process of a chemical analysis in which the quantity of some constituent of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent reacts in definite known proportion.

Answer 1

Titration

Question 2

Known concentration is called the

Answer 2

Titrant

Question 3

The titrant is in the

Answer 3

Buret

Question 4

The usual used Buret in pharmacy

Answer 4

50 ml Buret

Question 5

Unknown concentration is the

Answer 5

Titrand or analyte

Question 6

the analyte is seen in the

Answer 6

Erlenmeyer Flask

Question 7

Titration is Descend from the French word

Answer 7

Titrer

Question 8

titrer means proportion of ____/_____; measure
of fineness or purity.

Answer 8

gold or silver

Question 9

the point at which chemically equivalent
amounts of reactants have been mixed

Answer 9

equivalence point

Question 10

The ____________ ______ is where the number of moles of acid exactly equals the
number of moles of Base.

Answer 10

equivalence point

Question 11

to find out the concentration of the unknown solution which is the

Answer 11

Analyte

Question 12

 Must acquire skill of ___________,_____________, ___________, ____________

Answer 12

technique, patience, weakness and accuracy.

Question 13

all solutions and precipitates should be covered to protect them from _____, whenever
possible and every particle of _________, ___________, or ____________ must be regarded as
indispensable to the ultimate success of the _________.

Answer 13

dust, sample, solution, or precipitate, analyst.

Question 14

– every precaution should be taken to prevent loss or gain;

Answer 14

Accuracy in titration –

Question 15

Objective in studying ___________ ________________ ____________ is the acquisition of a
fundamental knowledge of the theory as well as practical ability in the application of
analytical methods.

Answer 15

quantitative pharmaceutical chemistry

Question 16

A good cleaning solution for glassware can be prepared by dissolving ____ g of
__________ ____________ in ____ ml of water and add ______ ml of ________ _____; slowly

Answer 16

200, sodium dichromate, 100, 1500, sulfuric acid

Question 17

Thick-walled, glass stoppered _______ (storage)

Answer 17

bottle

Question 18

Lab apparatus used in quantitative chemical analysis to measure the volume of a liquid
or gas.

Answer 18

Buret

Question 19

the valve at the end of a buret.

Answer 19

Stopcock

Question 20

Sizes of Burette from 5ml up to 100 ml but the most common is __ ml.

Answer 20

50

Question 21

Consists of graduated glass tube with a stop cock (_________ _____ or ________ at one end)

Answer 21

turning plug or “spigot”

Question 22

used to measure out or transfer small quantities of liquid, in volumes of milliliter or
microliter.

Answer 22

Pipette

Question 23

is also called “conical flask” or “titration flask”

Answer 23

Erlenmeyer Flask

Question 24

It features a _____ bottom, a _________ body and a ___________ neck.

Answer 24

flat, conical, and cylindrical

Question 25

Erlenmeyer Flask was named after _____ ________________ who created it in 1860.

Answer 25

Emil Erlenmeyer

Question 26

Preferably used in titration than beakers because it can easily be swirled without spilling.

Answer 26

Erlenmeyer Flask

Question 27

it is placed underneath the EF to aid with the ease of spotting the end point color
change.

Answer 27

White tile

Question 28

cleanses and rinses the tip of the burette

Answer 28

Wash bottles

Question 29

a piece of soft rubber tubing fitted to the end of a glass rod.

Answer 29

Policeman

Question 30

used in quantitative analysis must be pure. (meet the requirements – USP NF)

Answer 30

Reagents

Question 31

USP NF

Answer 31

United States Pharmacopeia National Formulary

Question 32

• Reagents are also called _______ in QPC

Answer 32

Analyzed

Question 33

QPC

Answer 33

Quantitative Pharmaceutical Calculations

Question 34

The purity and strength of chemical and drugs are expressed in
__________

Answer 34

Percent

Question 35

defined as those analytical methods which volume
of a solution of known concentration consumed during analysis is taken as a measure
of the amount of active constituent in a sample being analyzed.

Answer 35

Titrimetric method of analysis

Question 36

HCl is a chemical substance that is being analyzed and is being referred as ______________ or active constituent in the sample.

Answer 36

“analyte”

Question 37

Active constituent in the sample

Answer 37

Analyte

Question 38

defined as a solution of known concentration which is NaOH. Usually a base

Answer 38

Titrant

Question 39

act of adding and measuring the volume
of titrant used in the assay

Answer 39

Titration

Question 40

is usually a chemical which changes color at or very near the point in the titration
where equivalent quantities of analyte and titrant have reacted.

Answer 40

Indicator

Question 41

the theoretical point at which equivalent amount
of each have reacted.

Answer 41

Stoichiometric point or equivalence point

Question 42

Titration is stopped at some point “____ ________” at which there occurs a
sudden change in color.

Answer 42

end point

Question 43

– refers to unreacted analyte or titrand using a substance with known
concentration.

Answer 43

REsidual or back Titration

Question 44

unit of concentration expressed as the number of moles of dissolved solute per liter of solution

Answer 44

Molarity

Question 45

described as the number of gram or mole equivalents of solute present in one litre of a solution.

Answer 45

Normality

Question 46

colourless, weak acid that is widely usedas an indicator in titration experiments to indicate the endpoint of the titration

Answer 46

Phenolphthalein

Question 47

Use to put at the pack of the buret to see clearly

Answer 47

Reading card

Question 48

Bottom of the line

Answer 48

Meniscus

Question 49

Turning plug

Answer 49

Spigot

Question 50

According to the USP NF, reagents must be ____

Answer 50

Pure

Question 51

The formula for Concentration

Answer 51

Concentration = grams / mL

Question 52

Usually used to balance the purity

Answer 52

Water