Liquid CaCl conversion math check

[beertroll]

My LHBS was out of the LD Carlson calcium chloride, so I picked up a bottle of this instead. The manufacturer's description says the solution is 30-32% CaCl. To adjust my water per AJ's recommendations in the sticky above, is it as simple as using 1 tbs per 5 gallons, rather than 1 tsp? Are there any other considerations when using with CaCl as a liquid solution, or is it effectively the same as the dry version?

 

[ajdelange]

One thing that is different is that it will not pick up moisture from the air as the solid stuff will so you don't need to worry about that.

The sticky recommendation is for 4 - 5 grams of calcium chloride per 5 gallons. As most of the powdered calcium chloride is about 80% CaCl2 (the rest is water) that really means 3.2 - 4 grams per 5 gallons. This solution is 68 - 70% water. Thus to obtain 4 grams of CaCl2 you would need 4/0.3 = 13.3 grams of the solution. A tsp is about 5 mL and as a 30% solution is to have a density of about 1.3 grams/cc the 5 mL would give you 5*1.3= 6.5 grams of solution and 5*1.3*0.3 = 1.95 grams of CaCl2. Thus 2 tsp would give you 3.9 grams and a tbsp (3 tsp) about 5.85. Looks like 2 - 2 1/2 tsp should cover it. It isn't necessary to be exact.

 

[beertroll]

Thanks. I figured I was worrying unnecessarily, but when I'm learning something new I like to be exact in my thinking, even if I'm not so in my brewing.