methods of preparing insoluble salts
TRANSCRIPT
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METHODS OF PREPARING INSOLUBLE SALTS
GROUP 3:TRUONG NGOC DIEMLY NGOC DIEMHUYNH THI HANHHUYNH PHUC DUONG
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THE MAINT POINT
Definition of insoluble salt.Methods of preparing insoluble salts.The experiment about insoluble salts.Summary.
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DEFINITION OF INSOLUBLE SALTS
Insoluble salt is salt that not dissolves in water at temperature.
A Precipitate is an insoluble solid that forms when 2 or more soluble reactants are combined.
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Figure 1.1 Precipitation of Group I Chloride Figure 1.2 Fe+3 thiocyanate complex
Common precipitates:
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Figure 1.3 Precipitation of lead chromate Figure 1.4 Precipitation of silver chloride
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Figure 1.5 Precipitation of group II sulfides Figure 1.6 Formation of Cu2+ ion
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Figure 1.7 Formation of Ni2+ complex Figure 1.8 Formation of MnO4- ion
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Methods of preparing insoluble salts
Mix the two solutions –a precipitate will form. Filter the mixture. Rinse the solid with distilled water and allow to dry.
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The experiment about insoluble salts
BaCl2 Na2SO4Ba2+
Cl-Na+
SO42-
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NaCl
BaSO4
The reaction
BaCl2(aq) + Na2SO4(aq) 2NaCl(aq) + BaSO4(s)
The ionic equation
Ba2+(aq)
+ SO42- (aq) BaSO4(s)
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summary
This methods is called double decomposition
Soluble salt +soluble salt insoluble + soluble salt
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