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EXERCISE IT A 200 Mg sample ontains Fed3 & MgCl2. AMMonia Was added to the sample to precipitate the chlorides. The filtrated sample was then heated to form 235.59 ng of oxides • Det. the % Fe in the sample if itr contains Smg of inert natter • Calc- the mass of Maae in the sample • How many milligians of iron oxide nas fommed atter heating.

EXERCISE IT A 200 Mg sample ontains Fed3 & MgCl2. AMMonia Was added to the sample to precipitate the chlorides. The filtrated sample was then heated to form 235.59 ng of oxides • Det. the % Fe in the sample if itr contains Smg of inert natter • Calc- the mass of Maae in the sample • How many milligians of iron oxide nas fommed atter heating.

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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EXERCISE IT A 00 Mg sample ontains Fed3 & MgCl2. AMMOnia Was added to the sample to precipitate the chlorides. The filtrated sample was then heated to form 235.59 mg of oxides • Det. the % Fe in the sample if it contains 5mg of inert matter • Calc. the mass of Mgae in the sample • How many milligians of iron oxide nas fommed ater heating.
Transcribed Image Text:EXERCISE IT A 00 Mg sample ontains Fed3 & MgCl2. AMMOnia Was added to the sample to precipitate the chlorides. The filtrated sample was then heated to form 235.59 mg of oxides • Det. the % Fe in the sample if it contains 5mg of inert matter • Calc. the mass of Mgae in the sample • How many milligians of iron oxide nas fommed ater heating.
Expert Solution
Step 1

The chemical reaction

FeCl3 + 3NH3 + 3H2O -----> Fe(OH)3(s) + 3NH4Cl  ................(1)

MgCl2 + 2NH3 + 2H2O ------> Mg(OH)2(aq) + 2NH4Cl  .................(2) 

As, Mg(OH)2 is more soluble in water than Fe(OH)3.

So, after reaction with NH3, the precipitate would contain exclusively Fe(OH)3.

This precipitate when heated gives Fe2O3.

2Fe(OH)3 -----> Fe2O3 + 3H2O  ...............(3)

 

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