How to make a salt by following these four methods

1. SALT PREPARATION
REVIEW

2. METHODS IN MAKING SALT
1. Reacting a metal with an acid
2. Reacting an insoluble base with an
acid
3. Neutralising an alkali with an acid by
titration
4. Precipitation

3. 1. Reacting a metal with an acid
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International (Singapore) Pte. Ltd.

4. Reacting a metal with an acid (cont.)
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International (Singapore) Pte. Ltd.

5. 2. Reacting an insoluble base
with an acid

6. 3. Neutralising an alkali
with an acid by titration

7. 4. Precipitation
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International (Singapore) Pte. Ltd.

8. Soluble or Insoluble?
Soluble Compounds Insoluble Compounds
All salts of Group I elements
All nitrates
All ammonium salts
Most chlorides, bromides and iodides Chlorides, bromides and iodides of
silver and lead
Most sulfates Sulfates of calcium, barium and
lead
Group I hydroxides and carbonates Most hydroxides and carbonates
are soluble (calcium hydroxide is
slightly soluble)
Group I and II oxides react with water Most metal oxides

9. Soluble or Insoluble?
• Potassium bromide
• Silver bromide
• Sodium hydroxide
• Calcium sulfate
• Lead iodide

10. How will you prepare ZnSO4?
Since ZnSO4 is a soluble salt (Note: Most
sulphates are soluble), I can use reaction with
acid, base or carbonate or titration. If I have
available acid and metal then I can do that
instead of titration. I will then mix zinc powder
with sulphuric acid until no effervescence is
present. I will then filter it, collect the filtrate
and crystallise it. Once I reach a saturated
solution, I will let it cool. I will then wash it with
distilled water to remove impurities and then
dry it on filter paper.

11. How will you prepare these salts?
• CuSO4 (Jorge & Holly)
• CaCl (Satu & Alicia)
• K2SO4 (Rizal & Vanessa)
• PbCl2 (Zaynab & Reem)

12. TO PREPARE SALT
Reacting a
metal with Reacting an
an acid
insoluble base
with an acid
Neutralising an
alkali with an Precipitation
acid by titration