Question

what is the observation when sodium hydroxide is added to aqueous solution of aluminium chloride​...
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Answer 1

Answer:

ans is aluminium hydroxide Al(OH)3 and HCl

Answer 2

Answer:

This reaction may proceed mostly in one direction due to solubility. eg: aluminum hydroxide is not very soluble (0.0001 g/100 mL at 20

o

C). so the overall reaction will be :

3NaOH + AlCl

3

⟶3NaCl +Al(OH)

3

NaOH⇋Na

+

+OH

−

AlCl

3

⇋Al

3+

+3Cl

−

Na

+

+Cl

−

⇋NaCl

Al

3+

+3OH

−

⇋Al(OH)

3

2H

2

O⇋H

3

O

+

+OH

−

H

3

O

+

Cl

−

⇋HCl+H

2

O

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