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You can't see the salt in sea water. Explain how you could convince someone that there is salt mixed into the sea water.

Question

You can't see the salt in sea water. Explain how you could convince someone that there is salt mixed into the sea water.

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Solution

  1. Collect a Sample: The first step would be to collect a sample of sea water. This can be done by simply filling a clear container with water from the sea.

  2. Evaporation: Next, you would need to allow the water to evaporate. This can be done by leaving the container in a sunny spot for a few days. As the water evaporates, the salt that was dissolved in the water will be left behind.

  3. Observation: Once the water has completely evaporated, you should be able to see a residue at the bottom of the container. This residue is the salt that was mixed into the sea water.

  4. Taste Test: If visual evidence is not enough, a taste test can be performed. By tasting the residue, you should be able to identify the salty flavor.

  5. Scientific Test: For a more scientific approach, you could also use a conductivity test. Salt water conducts electricity better than fresh water, so a conductivity meter would show a higher reading for sea water.

  6. Comparison: Finally, you could compare the sea water sample with a sample of fresh water. After evaporating both samples, you should see a residue in the sea water sample but not in the fresh water sample. This would provide clear evidence that there is salt mixed into the sea water.

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