Obtain a sample of rainwater. Add to it a few drops of universal indicator. Meausre its pH. Describe the nature of the sample of rainwater and explain the effect if it has on the living world.
If the pH of rainwater is less than 7, it means its nature is acidic.
If the pH of rainwater is above 7, it means its nature is basic.
If the pH of rainwater is 7, it means its nature is neutral.
Natural rainwater has a pH around 5.6 and is slightly acidic. If value of pH is below pH, then it is considered as “acid rain”. Acid rain particularly damages:
i. Lakes, rivers, streams
ii. Forests
iii. Plants and animals
iv. Human beings (especially damages the skin)
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