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Why is seawater salty?
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Solution
Sea water is salty because it contains a large amount of salt dissolved in it. The salt present in ocean water is mainly sodium chloride, or the common salt we consume. The salts enter the ocean through rivers, which pass over rocks and soil, picking up salt along the way, has made the seawater salty. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the sea.
- Carbon dioxide from the surrounding air has been dissolved in the rain that falls on the soil.
- Since the carbonic acid is present, this makes the rainfall slightly acidic.
- Rocks are physically eroded by rain, and they are chemically eroded by acids, which also carry salts and minerals in a dissolved state as ions.
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Solution
Sea water is salty because it contains a large amount of salt dissolved in it. The salt present in ocean water is mainly sodium chloride, or the common salt we consume. The salts enter the ocean through rivers, which pass over rocks and soil, picking up salt along the way, has made the seawater salty. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the sea.
- Carbon dioxide from the surrounding air has been dissolved in the rain that falls on the soil.
- Since the carbonic acid is present, this makes the rainfall slightly acidic.
- Rocks are physically eroded by rain, and they are chemically eroded by acids, which also carry salts and minerals in a dissolved state as ions.
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