Limewater 6 Exhale through a straw for 30 s Vinegar (5 mL) 7 + Baking Soda Copper Sulfate 8 + Water Copper Sulfate solution (use half 9 from #8) + Iron Nail Copper Sulfate Solution (from #8) 10 + Sodium Hydroxide Magnesium + 11 Hydrochloric Acid (5 mL)
6 Limewater Exhale through a straw for 30 s 7 Vinegar (5 mL) + Baking Soda 8 Copper Sulfate + Water 9 Copper Sulfate solution (use half from #8) + Iron Nail 10 Copper Sulfate Solution (from #8) + Sodium Hydroxide 11 Magnesium + Hydrochloric Acid (5 mL)