When Phosphate Rock, Ca₃(PO₄)₂(s), Is Converted to Phosphorus

question 48

Multiple Choice

When phosphate rock, Ca₃(PO₄) ₂(s) , is converted to phosphorus,

• A) one of the products of the reaction is water.
• B) sulfuric acid is added to generate insoluble calcium sulfate.
• C) hydrogen is used to reduce the phosphate to phosphorus.
• D) silica is added to form a calcium silicate slag.
• E) oxygen must be added to prevent reaction of P₄.

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