• Al, Cu, Ni, Pb

• butanol
• ammonium hydroxide
• alizarin yellow
• bromthymol blue
• phenol red
• phenolphthalein

Fractional Crystallization 

• borax

• sodium chloride

• ammonium sulfide
• lead nitrate
• potassium chromate
• silver nitrate
• sodium chloride
• sodium sulfate

• calcium carbonate
• calcium hydroxide
• mineral oil
• sucrose
• yeast

• sodium carbonate
• sulfuric acid

• Al, Cu, Pb, Ni

• calcium carbonate
• calcium hydroxide
• hydrochloric acid

• ammonium hydroxide

• copper(II) nitrate
• lithium chloride
• sodium chloride

• acetic anhydride
• phosphoric acid
• salicylic acid

• ammonium bromide
• ammonium carbonate
• ammonium chloride
• ammonium chromate
• calcium bromide
• calcium chloride
• calcium nitrate
• copper(II) chloride
• copper(II) nitrate
• copper(II) sulfate
• hydrochloric acid
• iron(III) nitrate
• lead nitrate
• nickel(II) nitrate
• potassium bromide
• potassium carbonate
• potassium chloride
• potassium chromate
• potassium iodide
• potassium nitrate
• silver nitrate
• sodium bromide
• sodium carbonate
• sodium chloride
• sodium iodide
• sodium nitrate
• sodium phosphate
• zinc chloride
• zinc nitrate