A fish farmer fills tanks with water of known salinity…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A fish farmer fills tanks with water of known salinity.
- How much salt is in kg of sea water of salinity parts per thousand?
- How much salt is in kg of inland water of salinity parts per thousand?
- How much salt is in kg of water of salinity parts per thousand?
Need a reminder? The key ideaShow
Salinity is in parts per thousand, which is the grams of salt in each kilogram of water. Inland waters are below , the sea is to and some hypersaline lagoons are above . The air temperature falls about for each kilometre of height. A eurythermal organism bears a wide range of temperature, and a stenothermal one a narrow range.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. The salinity gives the grams of salt in each kilogram of water.
Plan. Multiply the salinity by the mass of water.
Step 1. (a) g.
Step 2. (b) g.
Step 3. (c) g.
Answer: g; g; g.
Check. The sea water holds the most salt in each kilogram, so it holds the most salt for equal masses of water.
Watch out. Do not divide by again. The words parts per thousand are already in the unit.
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