Equipment: Petri dish, Weigh boat, baby flower, calcium carbonate, universals indication, bromothymol blue, sodium sulfide and acid
Method:
1. Place the weigh boat in the middle of the Petri dish.
2. Moist the chunk of apple and baby flower petal with water then place them both in the Petri dish around the weigh boat. Add 1 scoop of calcium carbonate that is moist and Make sure they are all placed separately.
3. Do 3 drops of universals indication and 3 drops of bromothymol blue around the weigh boat and around the Petri dish. Keep them separate.
4. In the weigh boat put a scoop of sodium sulfide. Drop water on it then stir.
5. Add 4 drops of acid in the weigh boat then quickly close it.
Results:
Observation: We saw how the universal indication, which was green at first and the bromothymol blue changed colour. The universal indication turned into a peachy like colour and the bromothymol blue turned green and yellow. We also noticed how the red baby flower petal started to turn a light pink colour though it was supposed to turn hard but we didn't have time. The apple turned a little bit dry and hard but due to not having much time it was still a bit moist. The moist calcium carbonate turned crusty. These all happened because of the effects of acid rain.
Explanation: Acid rain was formed when fossil fuels such as coal, oil and natural gas was burned. Sulfur dioxide and nitrogen oxides are released in the air and rise up the atmosphere. The molecules dissolve in the water in the clouds. Then the rainwater becomes more acidic.
