22. Calculate the sample required to prepare 1 liter of 0.25 mol/l solution:
a) Ni(NO3)2
b) K2Cr2O7
c) Mg(CH3COO)2×4H2O
d) CaCl2
e) KI
f) Na2CO3
g) MgSO4
h) BaCl2
i) NaHCO3
j) Na2CO3×10H2O
THE SOLUTION FOR ALL OPTIONS
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