Calculate the mass fractions of elements in double superphosphate (phosphorus fertilizer) Ca (H2PO4) 2.
| April 10, 2021 | education
Mr (Ca(H2PO4)2) = Ar (Ca) * N (Ca) + Ar (H) * N (H) + Ar (P) * N (P) + Ar (O) * N (O) = 40 * 1 + 1 * 4 + 31 * 2 + 16 * 8 = 234;
ω (Ca в Ca(H2PO4)2) = N (Ca в Ca(H2PO4)2) * Ar (Ca) * 100% / Mr (Ca(H2PO4)2) = 1 * 40 * 100% / 234 = 17,09%;
ω (H в Ca(H2PO4)2) = N (H в Ca(H2PO4)2) * Ar (H) * 100% / Mr (Ca(H2PO4)2) = 4 * 1 * 100% / 234 = 1,71%;
ω (P в Ca(H2PO4)2) = N (P в Ca(H2PO4)2) * Ar (P) * 100% / Mr (Ca(H2PO4)2) = 2 * 31 * 100% / 234 = 26,5%;
ω (O в Ca(H2PO4)2) = 100% – ω (Ca в Ca(H2PO4)2) – ω (H в Ca(H2PO4)2) – ω (P в Ca(H2PO4)2) = 100% – 17,09% – 1,71% – 26,5% = 54,7%.
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