Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > Brew Science > need help with salts - CaCl2+6H2O

Reply
 
LinkBack Thread Tools
Old 09-15-2011, 03:37 PM   #1
400d
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Posts: 584
Liked 3 Times on 3 Posts
Likes Given: 1

Default need help with salts - CaCl2+6H2O

ok guys, I bought some CaCl2, but mine has this written on the bottle: CaCl2+6H2O

when I asked the guy in the store, he said that it's pure CaCl2 with 6 molecules of H2O attached to it

can I still use this for my brewing water?

thanks

__________________
Brew me a river...
400d is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2011, 03:45 PM   #2
Rushis
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Pasadena, CA
Posts: 289
Liked 2 Times on 2 Posts
Likes Given: 1

Default

yep. Use the right formula weight and you'll have no problem achieving your desired calcium concentration.

__________________
Rushis is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2011, 03:51 PM   #3
400d
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Posts: 584
Liked 3 Times on 3 Posts
Likes Given: 1

Default

Quote:
Originally Posted by Rushis View Post
yep. Use the right formula weight and you'll have no problem achieving your desired calcium concentration.
you mean just to input the data in the calculator as usual?

I'm a little bit worried about this, don't know why.... What does it mean anyway "6 molecules of H2O attached to it..." and how does it affect my water?
__________________
Brew me a river...
400d is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2011, 04:04 PM   #4
shutupjojo
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2010
Location: dundee, Oregon
Posts: 455
Liked 27 Times on 19 Posts
Likes Given: 5

Default

Calcium chloride hexahydrate. It's just calcium chloride with a little water in it . It is used the same as regular CaCl2.

__________________
shutupjojo is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2011, 04:50 PM   #5
400d
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Posts: 584
Liked 3 Times on 3 Posts
Likes Given: 1

Default

Quote:
Originally Posted by shutupjojo View Post
Calcium chloride hexahydrate. It's just calcium chloride with a little water in it . It is used the same as regular CaCl2.
are you completely sure about it? because this is the explanation that I have got from a friend:

- molecular mass of CaCl is approx. 111
- molecular mass of 6H2O is approx. 108 (six molecules x 18 = 108)

overall weight of 1 molecule Calcium chloride hexahydrate is 111+108=219

so we need to determine how much of pure CaCl is in one molecule of Calcium chloride hexahydrate:

111/219=0,5068*100=50,68%

this means that I should add double amount

any thoughts on this?
__________________
Brew me a river...
400d is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2011, 11:27 PM   #6
ajdelange
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: McLean/Ogden, Virginia/Quebec
Posts: 5,653
Liked 536 Times on 439 Posts
Likes Given: 15

Default

When calcium chloride crystalizes some water molecules are incorporated into the crystal lattice. For each calcium ion there are a pair of chlorine ions and 0, 1, 2, 4, or 6 molecules of water. This is referred to a "water of hydration". Your friend is quite right. The atomic weight of calcium is 40 and that of chlorine 35.45. Each water molecule has a molecular weight of 18 and there are six of them in the hexahydrate so a mole of CaCl2.6H2O has molecular weight of 40 + 2*35.45 + 6*18 = 218.90 (approximately). Of these 219 grams 40 are calcium so the percentage calcium is 40/219 = 18.27%. The amount of chloride is 70.9/219 = 32.4%.

Have a look at http://en.wikipedia.org/wiki/Calcium_chloride. They list the molecular weights of all the forms and you can use those to determine how many grams of hexahydrate are required to provide the same amount of calcium as 1 gram of the anhydrous (no water) i.e. 219.08/110.98 = 1.9740. Etc.

__________________
ajdelange is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is CaCl2 always CaCl2?? wildwest450 Brew Science 10 06-02-2011 05:38 PM
Where do you buy salts from? hafmpty Brew Science 8 02-07-2010 06:40 PM
Adding salts to bk sjlammer Brew Science 16 01-18-2010 12:14 AM
When and What pot should I add Salts? Mr. Mojo Rising Brew Science 4 12-23-2009 02:42 PM
Brewing Salts? RonRock Brew Science 5 09-23-2009 08:13 PM