
Concept explainers
(a)
Interpretation:
The precipitation, acid-base and redox processes discussed in the method of obtaining magnesium from seawater have to be identified.
Concept Introduction:
Redox reaction:
- The
chemical reaction in which,oxidation reaction and reduction reaction always occurs together and are called oxidation reduction reaction, abbreviated as redox reaction.
Acid -Base reaction:
- The reaction between acid and base to produce a salt is called acid-base reaction.
Precipitation reaction:
- If precipitate is formed, when the two solutions are mixed together is called precipitation reaction.
(b)
Interpretation:
The reason for using
Concept Introduction:
Redox reaction:
- The chemical reaction in which, oxidation reaction and reduction reaction always occurs together and are called oxidation reduction reaction, abbreviated as redox reaction.
Acid -Base reaction:
- The reaction between acid and base to produce a salt is called acid-base reaction.
Precipitation reaction:
- If precipitate is formed, when the two solutions are mixed together is called precipitation reaction.
(c)
Interpretation:
Reason for using dolomite to bring about a precipitation reaction has to be explained.
Concept Introduction:
Redox reaction:
- The chemical reaction in which, oxidation reaction and reduction reaction always occurs together and are called oxidation reduction reaction, abbreviated as redox reaction.
Acid -Base reaction:
- The reaction between acid and base to produce a salt is called acid-base reaction.
Precipitation reaction:
- If precipitate is formed, when the two solutions are mixed together is called precipitation reaction.
(d)
Interpretation:
Reason for mining of magnesium takes place from ocean rather than earth crust has to be explained.
Concept Introduction:
Redox reaction:
- The chemical reaction in which, oxidation reaction and reduction reaction always occurs together and are called oxidation reduction reaction, abbreviated as redox reaction.
Acid -Base reaction:
- The reaction between acid and base to produce a salt is called acid-base reaction.
Precipitation reaction:
- If precipitate is formed, when the two solutions are mixed together is called precipitation reaction.

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Chapter 4 Solutions
General Chemistry
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