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单词 superphosphate
释义
superphosphate

Chemistry
  • A commercial phosphate mixture consisting mainly of monocalcium phosphate. Single-superphosphate is made by treating phosphate rock with sulphuric acid; the product contains 16–20% ‘available’ P2O5:

    Ca10(PO4)6F2+7H2SO4=3Ca(H2PO4)2+7CaSO4+2HF

    Triple-superphosphate is made by using phosphoric(V) acid in place of sulphuric acid; the product contains 45–50% ‘available’ P2O5:

    Ca10(PO4)6F2+14H3PO4=10Ca(H2PO4)2+2HF


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