Vasiliev Chapter 6 Problem 58
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6.58. Calculate the number of water molecules (x) in the molecules of crystalline hydrates of salts indicated in the table, if from a sample of crystalline hydrate weighing m1 (g) we obtained m2 (g) of gravimetric form:
Option Salt m1, g Gravimetric form m2, g
1 BaCl2 xH2O 0.3245 BaSO4 0.3100
2 MgSO4 xH2O 0.5520 Mg2P2O7 0.2492
3 Al2(SO4)3 xH2O 0.7000 Al2O3 0.1070
4 CoSO4 xH2O 0.4800 BaSO4 0.3985
5 Cr2(SO4)3 xH2O 0.8500 Cr2O3 0.1803
6 NH4Fe(SO4)2 xH2O 0.5020 Fe2O3 0.0831
7 MnSO4 xH2O 0.3240 BaSO4 0.3137
8 CaCl2 xH2O 1.0000 CaO 0.2560
9 Na2SO4 xH2O 0.4000 BaSO4 0.3262
10 Ni(NO3)2 xH2O 0.3000 Ni(C4H7O2N2)2 0.2980
Option Salt m1, g Gravimetric form m2, g
1 BaCl2 xH2O 0.3245 BaSO4 0.3100
2 MgSO4 xH2O 0.5520 Mg2P2O7 0.2492
3 Al2(SO4)3 xH2O 0.7000 Al2O3 0.1070
4 CoSO4 xH2O 0.4800 BaSO4 0.3985
5 Cr2(SO4)3 xH2O 0.8500 Cr2O3 0.1803
6 NH4Fe(SO4)2 xH2O 0.5020 Fe2O3 0.0831
7 MnSO4 xH2O 0.3240 BaSO4 0.3137
8 CaCl2 xH2O 1.0000 CaO 0.2560
9 Na2SO4 xH2O 0.4000 BaSO4 0.3262
10 Ni(NO3)2 xH2O 0.3000 Ni(C4H7O2N2)2 0.2980
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