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mCaCl₂*xH₂O=111+18x u
CaCl₂*xH₂O --T--> CaCl₂ + xH₂O
111+18x g hydratu -------- 111g CaCl₂
2,5g hydratu ---------------- 1,27g CaCl₂
(111+18x)1,27 = 111*2,5
140,97+22,86x = 277,5
22,86x = 136,53
x ≈ 6
Hydrat zawiera 6 cząsteczek wody