Question

how to test the nature of calcium oxide​

Answer 1

Explanation:

Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. The broadly used term "lime" connotes calcium-containing inorganic materials, in which carbonates, oxides and hydroxides of calcium, silicon, magnesium, aluminium, and iron predominate. By contrast, quicklime specifically applies to the single chemical compound calcium oxide. Calcium oxide that survives processing without reacting in building products such as cement is called free lime.[5]

Answer 2

SCOPE

1.1 This standard prescribes the methods of

sampling and test for quicklime and hydrated

lime used for softening water and in various

chemical industries for the manufacture of

calcium carbide, paper, glass, sugar, greases,

bleaching powder and in the tanning of leather.

It covers the methods of determining carbonate,

volatile matter at 105°C, loss on ignition,

available lime, acid insoluble matter, (as SiO2)

iron oxide, alumina, total calcium oxide,

magnesium oxide, sulphates, dead burnt lime,

moisture and free calcium oxide. Screen

analysis of the material is also prescribed.

1.2 This standard does not deal with materials

but specifies the methods for determining

whether they comply with the requirements of

individual standards.

1.3 Should any inconsistency exist between the

requirements of this standard and those of the

standard for an individual material, the latter

shall prevail.

2 REFERENCES

2.1 The following Indian standards are

necessary adjuncts to this standard:

IS No. Title

265 : 1987 Specification for hydrochloric

acid ( third revision )

296 : 1986 Specification for sodium

carbonate, anhydrous ( third

revision )

323 : 1959 Specification for rectified spirit

( revised )

1070 : 1977 Specification for water for

general laboratory use ( second

revision )

3 TERMINOLOGY

3.0 For the purpose of this standard, the

following definitions shall apply.

3.1 Available Lime

Denotes such of those constituents of quicklime

and hydrated lime as enter into reaction under

the conditions of the method prescribed under 9.

3.2 Total Calcium Oxide

Denotes such of those constituents of quicklime

and hydrated lime as enter into reaction under

the conditions of the method prescribed

under 12.

3.3 Dead Burnt Lime

Denotes such of those constituents of quicklime

and hydrated lime as are calculated by the

method prescribed under 15.

3.4 Free Calcium Oxide

Denotes such constituents of hydrated lime

which are capable of being hydrated by steam

at atmospheric pressure.

4 SAMPLING

4.1 General Precautions

4.1.1 In drawing, preparing, storing and

handling test samples, the following

precautions and directions shall be observed.

4.1.2 Samples shall not be taken at a place

exposed to weather or from damaged or broken

packages

4.1.3 The sampling instrument shall be clean

and dry when used.

4.1.4 Precautions shall be taken to protect the

samples, the material being sampled, the

sampling instrument and the containers for

samples from adventitious contamination.

4.1.5 To draw a representative sample, the

contents of each container selected for sampling

shall be mixed as thoroughly as possible by

suitable means.

4.1.6 The samples shall be placed in clean, dry

and air-tight glass or other suitable containers

on which the material has no action.

4.1.7 The sample containers shall be of such a

size that they are almost completely filled by

the sample.

4.1.8 Each sample container shall be sealed

air-tight after filling and marked with full

details of sampling, the date of sampling,

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