117. Solving a chemistry problem
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117. Solving a chemistry problem
19. Potassium thiocyanate acted on solutions of salts: (NH4)2SO4 ⋅ ⋅ Fe2(SO4)3 and 3KCN ⋅ Fe(CN)3. In the first case, coloring from Fe(CNS)3 appeared, but not in the second case. Indicate which of the given salts is complex and which is double. How do they dissociate? The formula of potassium thiocyanate is KCNS.
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