1. Technology And Engineering
Expertise Interest
Chemical analysis

2. Gravimetric Analysis
SMK Negeri 13 Bandung

3. Objectives
After this session, the students are expected to be able to :
explain the definition of analysis, chemical analysis and gravimetric analysis
explain the steps of quantitative analysis
explain the advantages of gravimetric analysis
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4. Objectives 4. explain the condition of gravimetric analysis
5. distinguish the
separation process in
gravimetric analysis
6. explain the condition
of precipitate in
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5. Preface
What is
gravimetric analysis?
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6. .
What is analysis?
Chemical analysis?
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7. Chemical Analysis
Jobs to determinate the chemical composition of matter.
Resolution of a chemical compound into its proximate or ultimate parts
The determination of its element may contain
Composition are:
Qualitative  what
Quantitative  how many
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8. Steps of Quantitative Analysis
Sampling
Transform the target element to a measurable form
Measurement
Calculation
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9. Measurement in quantitative analysis
By volume
By weight
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10. Quantitative analysis by weight with the steps :
Gravimetric Analysis
Quantitative analysis by weight with the steps :
Isolating
Weighing
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11. Condition: The separation is complete
no ion remind or less than 0,1 gram
2. The element or compound of the element separated is pure
3. The element or compound is in the definite form.
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12. Advantages a. accurate and precise b. sources of error are
readily checked
c. absolute method (direct
measurement)
d. inexpensive apparatus
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13. (b) high accuracy, although the time-consuming limits this application
general applications
(a) standard to be used for the testing and/or calibration of instrumental techniques;
(b) high accuracy, although the time-consuming limits this application
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14. The separation process
a. Precipitation methods
b. Volatilization or evolution
methods
c. Electro analytical
d. Extraction and
chromatographic methods.
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15. The precipitate must be
1. insoluble
2. readily separated from the
solution by filtration, and
can be washed free of
soluble impurities.
3. convertible into a pure
substance of definite chemical
composition
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16. Volatilization Heating method - Lost on ignition
- Humidity/volatile matter
- Ash
- TS/TDS
2. Chemical method
- CO2 liberating from carbonate
compound
CO3= + H+  CO2 + H2O
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