During the topic on Acids and Bases one of the content pieces to focus on was Acid Rain. One student was curious about the topic. He did some research on his own, and found a practical to do. He sent me the details and asked if we could do it in class.
The practical was straightforward and was a good illustration of the point. The colour changes using indicators reinforced the idea of indicators while it showed how gases can make neutral solutions acidic.
The rest of the class had greater engagement for this lesson. I had seen this practical before and dismissed it as not very interesting, so it was a timely reminder that our life experiences shape what we think is interesting .
Hi Miss Trewin
I was looking up acid rain recipes because i was bored and found one
that my class could possibly do?
Bromothymol blue
Small clear bowl with a lid
Big glass bowl
Water (10 ml)
Matches (that have a high sulfur content?)
1. Pour around about 10ml of water into the big glass bowl. Add
Bromothymol blue until it makes a light blueish colour.
2. Burn matches and put them into the small glass bowl with lid. Cover
the bowl and let the matches burn out. Collect their emissions and
leave the lid sealed tightly shut.
3. Open the jar and quickly pour in the water/Bromothymol blue
solution. Quickly shut the lid to stop any more of the Carbon dioxide
from getting out. Shake the jar and watch the solution turn a beer
colour!
So yeah. A possible acid rain recipe. I also found some more that
involved spraying plants with acid but that isn't environmentally
friendly and I like my garden so my plants aren't going to die today!
No comments:
Post a Comment