2NH2OH∙HCl + 4Fe3+ + 5H2O = N2O + 4Fe2+ + 6H3O+ + 2Cl- Experimental procedure
Weigh an iron-enriched vitamin tablet (such as One-A-Day Plus Iron) to the nearest mg. Place the tablet in a mortar and pestle, and crush the tablet to a fine powder. Weigh precisely about 40 mg of the powder, transfer it to a 10 mL Erlenmeyer flask, add 5 mL of 0.01 M HCl, and place a magnetic stirring bar in the flask.