Diammonium phosphate (DAP) is (NH₄)₂HPO₄. It is produced by reacting ammonia with phosphoric acid: 2NH₃ + H₃PO₄ → (NH₄)₂HPO₄. It contains 18% N and 46% P₂O₅. Monoammonium phosphate (MAP) is NH₄H₂PO₄. Ammonium sulfate is (NH₄)₂SO₄. Triammonium phosphate is unstable. DAP is widely used as a starter fertilizer.
Explanation:
From Faraday's first law, m = ZQ, so Z = m/Q. SI unit is kg/C, but practical unit is g/C. It is the mass of substance liberated per unit charge.
Explanation:
Cathode (negative electrode): 2H₂O + 2e⁻ → H₂ + 2OH⁻ (or 2H⁺ + 2e⁻ → H₂). Hydrogen gas is collected at the cathode. At the anode, oxygen is produced: 2H₂O → O₂ + 4H⁺ + 4e⁻. The volume of H₂ is double that of O₂.
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