Write the equation for the hydrolysis of FeCl3.

| April 24, 2021 | education

Let us write down the equations for the hydrolysis of medium salt:
1st stage of hydrolysis:
FeCl3 + HOH = Fe (OH) Cl2 + HCl – molecular equation, confirms an acidic environment;
Fe3 + + 3Cl- + HOH = Fe (OH) 2+ + 2Cl- + H + + Cl- – full ionic;
Fe3 + + HOH = Fe (OH) 2+ + H + – the abbreviated equation shows an acidic environment;
2nd stage:
The process of hydrolysis of ferric chloride at each stage shows an acidic environment, the litmus indicator confirms the pH <7.
Fe (OH) Cl2 + H2O = Fe (OH) 2Cl + HCl – molecular equation;
Fe (OH) 2+ + H2O = Fe (OH) 2+ + H +;
3rd stage:
Fe (OH) 2Cl + H2O = Fe (OH) 3 + HCl – a hydroxide precipitate is formed;
Fe (OH) 2+ + Cl- + H2O = Fe (OH) 3 + H + + Cl- – hydrolysis proceeds as a chemical interaction of salt with water;
Fe (OH) 2+ + H2O = Fe (OH) 3 + H + – acidic environment is confirmed.



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