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1.1 Chemistry > Titration > Flashcards

Titration Flashcards

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1
Q

What is volumetric analysis?

A

A versatile form of quantitative chemical analysis

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2
Q

What is the purpose of volumetric analysis?

A

To use an accurately known volume and concentration of one solution to find accurate concentration of a second

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3
Q

What does volumetric analysis involve?

A

The careful measurement of volumes of solutions

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4
Q

What is the measuring device used in titrations?

A

A burette

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5
Q

Define volumetric analysis.

A

Analysis of a solution (Solution A) through incremental addition of a reagent solution (solution B) until the reaction is complete

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6
Q

What are the two main applications of titrations?

A

Determining purity

Determining concentration

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7
Q

What are the four types of titrations?

A

Acid-base
Complexometric
Redox
Precipitation

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8
Q

What is an analyte?

A

The substance being analysed

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9
Q

What is a titrant?

A

Solution in the burette

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10
Q

What does a titration measure?

A

The volume of one reagent required to react with a measured mass or volume of another reagent

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11
Q

What is a titration used for?

A

To determine the amount of acid or base present in a sample

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12
Q

What is an indicator used forf?

A

To signal the endpoint when

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13
Q

What is the purpose of a burette in a titration?

A

It delivers the titrant into a conical flask

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14
Q

What is the definition for a titration?

A

An analytical procedure whereby we react a known volume of solution of known concentration with a known volume of a solution of unknown concentration

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15
Q

What chemical is placed in the burette?

A

The chemical of known concentration

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16
Q

What is placed in the conical flask?

A

A specific volume of the unknown with the indicator

17
Q

What is a standard solution?

A

A solution of known concentration

18
Q

What is a primary standard?

A

A standard solution which has been prepared by accurately weighing out a pure compound and using it to make a solution of known volume

19
Q

What is a secondary standard?

A

A solution standardised against a primary standard

20
Q

What are the five requirements for a primary standard?

A

It should be 100% pure

Stable to drying temperatures. Stable at room temperature.

Readily available and fairly inexpensive

High formula (molecular) weights so that a larger weight is taken for a given number of moles

Should react completely to give a sharp end point

21
Q

Give an example of a primary standard for the titration of acids.
(3)

A

Sodium carbonate

TRIS

Oxalic acid

22
Q

Give an example of a primary standard for the titration of bases.
(2)

A

Potassium hydrogen phthalate

Potassium hydrogen iodate

23
Q

Give an example of a primary standard for redox titrations.

A

Potassium dichromate

24
Q

Give an example of a secondary standard.

A

Sodium Hydroxide

25
Q

Give some characteristics of a secondary standard.

4

A

Solution standardised against a primary standard

May not be pure

May deteriorate once the container is opened

May deteriorate once it has been prepared

26
Q

What is the equivalence point?

A

The moment at which the reaction has gone to completion

27
Q

What is the end point?

A

The point where an indicator changes colour

1.1 Chemistry (19 decks)

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