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Math/chemistry question

I have calcium chloride granules and would like to make a 30% solution with distilled water.
Any idea how much of each would get me there?
Is it as simple as 3 grams to 10 grams?

Thanks.

30% by weight would be 3g CaCl2 and 7g of water.

That weight assumes that the calcium chloride is completely anhydrous (without any attached water). Since calcium chloride is very hygroscopic and sucks moisture out of the air, its unlikely that many calcium chloride sources are anhydrous.

The best way to assess if you have created a certain strength solution is to measure its gravity with a hydrometer and comparing that gravity to a strength table for CaCL2.

Thanks guys. I think the 3:7 ratio would get me close enough. It’s for cheesemaking.

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