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Twelfth Grade (Grade 12) Analytical Methods Questions

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Grade 12 Analytical Methods
Complete the following reaction, which summarizes the gravimetric estimation of iron:

[math]Fe^(3+) + 3OH^(-) rarr Fe(OH)_3(s)[/math]
[math]2Fe(OH)_3(s) rarr[/math]
  1. [math]Fe_2O_3(s) + 3H_2 O[/math]
  2. [math]Fe_3O_4 + 2H_2O[/math]
  3. [math]Fe_2O_3 + 2H_2O[/math]
  4. [math]Fe_3O_4 + 3H_2O[/math]
Grade 12 Analytical Methods
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