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Chemistry · May / June 2025 · Paper 11 · Question 9

5070Formulae

The ions Ca2+ and PO4 3– combine to form an ionic compound. What is the formula of the compound?

  1. ACa2PO4
  2. BCa(PO4)3
  3. CCa2(PO4)3
  4. DCa3(PO4)2

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Correct answer: D. Ca3(PO4)2

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