Salinity – density – connection?
Hello
In saltwater aquariums, you can determine the salinity from the density (measured with a hydrometer) and the temperature using a table. If the density of my aquarium sample at 22.6°C is 1.0240 g/cm^3, the table gives me a salinity of 35. I'm curious to know which reference sample was used to create all these tables. The value of 35 means that 35 g of "salt" are produced per 1 kg of solution, but what solution do they use to create the tables? I mean, there could be anything in my aquarium that affects the density, so how can I relate that to a table value?
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What can be in the water that affects the density? Alcohol, magnesium nitrate or caesium chloride I can’t imagine everyone. ☺
Thank you for your answer. But it is logical to calculate a sample from my aquarium with a table value. I could also have sugar, spit and urine in my aquarium or my sample could be completely unknown… This makes sense only if my aquarium water has the same salts as the sample that made such a table, or am I wrong?
I don’t understand anything about aquariums. But I assume that your fish are sensitive to anything that is not salt or water (which fish may swim in syrup or Ρіѕѕе?). It is therefore reasonable to assume that it is not all contained in the water.
Yeah, that’s right. But I can’t compare apples with pears. If I use an aräometer to measure the density for the water in my seawater aquarium, you should use a table to determine the salinity:
http://www.mathgame.de/Aqua/Table_Salinity.pdf
But on the basis of which reference liquid was this table prepared?