AP Chemistry Lab Manual

Add 5-6 drops 3%H2O2 to hasten the process. Mix thoroughly. If it doesn’t dissolve, heat for a few minutes until all the solid dissolves. Dilute solution to a total of 4 mL with distilled water and divide the solution into 2 parts to be tested for Fe3+ ions in step 9 and Mn2+ ions in step 10. Add 1-2 drops 0.5M KSCN to one test tube from part 6. ................
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