 |
Asia-Pacific Forum
on Science Learning and Teaching, Volume 5, Issue 1, Article 4 (Apr.,
2004) Man Wai FONG A demonstration of acid rain
|
| |
Asia-Pacific Forum
on Science Learning and Teaching, Volume 5, Issue 1, Article 4 (Apr.,
2004) Man Wai FONG A demonstration of acid rain
|
Procedure
Experimental set-up
1. Prepare an indicator solution by dissolving 0.01g methyl orange in 100 ml distilled water.
2. Dilute the indicator solution from 10 ml to 50 ml. Add 10 ml of the resulting indicator solution to each of the 2 glasses.
3. Stick a wooden splint to the inner side of the glass containing 10 ml indicator solution by a blue tack (Fig. 1a).
4. Stick 2 matches to the inner side of another glass containing 10 ml indicator solution by a blue tack (Fig.1b).
Fig. 1a
Fig. 1bProduction of acidic gases
5. Ignite the wooden splint (Fig. 2a) and the matches (Fig. 2b) by a glowing splint.
Collection of acidic gases
6. Cover the glasses with watch glasses.
Indication of the formation of acid rain
7. Swirl the indicator solutions gently and observe their color.
Copyright (C) 2004 HKIEd APFSLT. Volume 5, Issue 1, Article 4 (Apr., 2004). All Rights Reserved.
