Question: step 3 ?? 3. Prepare a 250mL standard iron solution containing 0.1mg/mL of the Fe ion by dissolving the appropriate weight of analytical grade FeSO4.(NH4)2SO46H2O

step 3 ??

3. Prepare a 250mL standard iron solution containing 0.1mg/mL of the Fe ion by dissolving the appropriate weight of analytical grade FeSO4.(NH4)2SO46H2O in 50mL of water containing 10mL of 1MH2SO4. 4. Dilute to 250mL with water in a volumetric flask

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