Have you ever wondered how much salt is actually in seawater? I’ve always known it was a lot, but I didn’t realize quite how much until I had to start making artificial seawater for my experiments.
Here are the major components–the ones I can actually weigh out on a balance. (We make stock solutions for trace elements.)
Usually I weigh out each salt individually and transfer it directly into my milliQ water, but just for grins I put it all in one big weighing dish this time.
It works out to about 40 g per liter of seawater. Major components are sodium chloride (of course), magnesium chloride, and sodium sulfate.