Question

Explain how pH change in the river water can endanger the live of aquatic animals like fish

Answer 1

The aquatic animals(like fish) can survive within a narrow range of pH range. When the pH of rain water is nearly 5.6, it is known acid rain. When acid rain falls on these water bodies, it lowers down the pH of water to a great extent and as a result, the water becomes acidic that the survival of aquatic animals becomes difficult. This high acidity of water can endanger the live of aquatic animals. To prevent the fish from being killed calcium carbonate is often added to water which neutralizes the acid that came from acid rain.

Hope this helps you!!

Answer 2

Answer:

Normally, the pH of river water is about 7.2 that is neutral or slightly basic but due to acid rain or some chemicals released by industries makes it acidic having pH of 5 to 5.7 which affects the aquatic life because they are not adaptable in acidic water . Large number of fishes will die and also makes the water polluted and unfit for any use .

It can be prevented by adding base like calcium carbonate which neutralizes the   river water .

Preventive measures while adding calcium carbonate :-

• . Adds slowly calcium carbonate and keep on checking the river water because if you adds  more than required may the water gets too basic and that will also harmful for aquatic life.

• once the water get neutralizes , stop adding calcium  carbonate

                                           ***Hope it helps***