Fe(NO3)3 + MgO Fe2O3 + Mg(NO3)2

Fe(NO3)3 + MgO Fe2O3 + Mg(NO3)2 .(NH4)3N + Cr(CrO4)2 = (NH4)2Cr04 + _Cr3N4 7.) Cu3(PO4)2 + Na2SO4 Na3PO4 + CuSO4 8.) AICI + H20 Al(OH)3 + HCI

Balance the following chemical equations

The Correct Answer and Explanation is :

Here are the balanced chemical equations:

1. Iron(III) Nitrate and Magnesium Oxide Reaction
   [
   2Fe(NO_3)_3 + 3MgO → Fe_2O_3 + 3Mg(NO_3)_2
   ]
2. Ammonium Nitride and Chromium Chromate Reaction
   [
   (NH_4)_3N + 2Cr(CrO_4)_2 → 3(NH_4)_2CrO_4 + Cr_3N_4
   ]
3. Copper(II) Phosphate and Sodium Sulfate Reaction
   [
   Cu_3(PO_4)_2 + 3Na_2SO_4 → 2Na_3PO_4 + 3CuSO_4
   ]
4. Aluminum Chloride and Water Reaction
   [
   AlCl_3 + 3H_2O → Al(OH)_3 + 3HCl
   ]

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Explanation:

Balancing chemical equations ensures that the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides of the reaction.

1. First Reaction: Fe(NO₃)₃ + MgO

• Iron(III) nitrate reacts with magnesium oxide to form iron(III) oxide and magnesium nitrate.
• Each side must have the same number of Fe, NO₃, Mg, and O atoms.
• Balancing Fe, NO₃, and Mg requires a 2:3:1:3 ratio.

1. Second Reaction: (NH₄)₃N + Cr(CrO₄)₂

• The ammonium nitride reacts with chromium chromate to form ammonium chromate and chromium nitride.
• The coefficient 2 before Cr(CrO₄)₂ ensures equal Cr atoms on both sides.
• The nitrogen atoms must also balance.

1. Third Reaction: Cu₃(PO₄)₂ + Na₂SO₄

• Copper(II) phosphate reacts with sodium sulfate to form sodium phosphate and copper sulfate.
• Sodium and phosphate ions are balanced with a 3:2 ratio.

1. Fourth Reaction: AlCl₃ + H₂O

• Aluminum chloride reacts with water to form aluminum hydroxide and hydrochloric acid.
• The reaction follows a 1:3:1:3 ratio to balance the Cl and OH groups.

These steps ensure mass balance and charge neutrality, making the equations chemically correct.