Lab #4 Chemical or Physical Change? – Physical Description Before Observations # Reactants Explain or Combining after/during Mixing Chemical Limewater (5 mL) + 1 Cobalt Chloride (2 drops) Limewater (5 mL) + 2 Phenopthalein (2 drops) Copper Sulfate 3 (Mortar and Pestle) Penny + 4 Salt + Vinegar Calcium Hydroxide 5 + Ammonium Chloride
Lab #4 – Chemical or Physical Change? # Reactants Description Before Combining Observations after/during Mixing Physical or Chemical Explain 1 Limewater (5 mL) + Cobalt Chloride (2 drops) 2 Limewater (5 mL) + Phenopthalein (2 drops) 3 Copper Sulfate (Mortar and Pestle) 4 Penny + Salt + Vinegar 5 Calcium Hydroxide + Ammonium Chloride