Mg Cl ratio

[poopsko24]

I just got a 50# bag of magnesium chloride. I don't use Randy's two part, I use a calcium reactor and a kalk reactor for top off. I want to use the Mg Cl for boosting up my IO salt mix, and if the tankd goes a little low also. I've read all the articles I can read about it, but are we still mixing the epsom salt in with the mg cl ? Or am I to use the Mg Cl straight up by itself ? I've seen the 10:1 ratio on posts , and I'm still a little confused on why I have to use the epsom salts. They Mg Cl that I bought is in pellet form, and its for Dead Sea Works.

 

[bertoni]

The mixture helps keep the ionic balance of the saltwater in line with the ocean. You don't have to use it for a one-time shot, but I probably would go ahead and mix it up that way.

 

[poopsko24]

10:1 ratio then?

 

[Boomer]

If you mean the Mg:Cl in NSW it is 15:1 or 19,000 ppm / 1280 ppm . In std seawater mixes it is about ;

6.5 g / l of MgSO4 - 7 H20 to

5.0 g / l of MgCl2 - 6 H2O

If you mean the ratio of MgCl2 to MgSO4, then yes 10:1

However, do not get lost with this ratio, as this ratio is molar value, as in 10 moles to 1 mole, not 10 parts to 1 part. 1 mole of MgCl2 does not weigh the same, in grams, as 1 mole of MgSO4


1 mole of MgCl2 = 71 grams x 10 = 710 grams

1 mole of MgSO4 = 120 grams

or 6:1 by weight, 710 / 120

Have you read this:

A Homemade Magnesium Supplement
http://web.archive.org/web/20001017...work.com/fish2/aqfm/1999/june/bio/default.asp

 

[Hobster]

<a href=showthread.php?s=&postid=7191562#post7191562 target=_blank>Originally posted</a> by Boomer
If you mean the Mg:Cl in NSW it is 15:1 or 19,000 ppm / 1280 ppm . In std seawater mixes it is about ;

6.5 g / l of MgSO4 - 7 H20 to

5.0 g / l of MgCl2 - 6 H2O

If you mean the ratio of MgCl2 to MgSO4, then yes 10:1

However, do not get lost with this ratio, as this ratio is molar value, as in 10 moles to 1 mole, not 10 parts to 1 part. 1 mole of MgCl2 does not weigh the same, in grams, as 1 mole of MgSO4


1 mole of MgCl2 = 71 grams x 10 = 710 grams

1 mole of MgSO4 = 120 grams

or 6:1 by weight, 710 / 120

Have you read this:

A Homemade Magnesium Supplement
http://web.archive.org/web/20001017...work.com/fish2/aqfm/1999/june/bio/default.asp

Boomer, what confuses us non Chemistry types who still think a mole is either on your nose or a furry little rodent is the last paragraph of the article.

"Many of you wonââ"šÂ¬Ã¢"žÂ¢t have good balances at home, but making approximately a 10:1 mixture of these two salts should be fairly simple. Because their densities are fairly close to each other (1.67 grams per cubic centimeter for Epsom salts and 1.56 grams per cubic centimeter for magnesium chloride hexahydrate) one should be able to get fairly close by simply using 10 volumes of magnesium chloride hexahydrate and one volume of Epsom salts. Use of this supplement will not appreciably disrupt the ionic ratios of the major two anions in seawater."

 

[poopsko24]

<a href=showthread.php?s=&postid=7191562#post7191562 target=_blank>Originally posted</a> by Boomer
If you mean the Mg:Cl in NSW it is 15:1 or 19,000 ppm / 1280 ppm . In std seawater mixes it is about ;

6.5 g / l of MgSO4 - 7 H20 to

5.0 g / l of MgCl2 - 6 H2O

If you mean the ratio of MgCl2 to MgSO4, then yes 10:1

However, do not get lost with this ratio, as this ratio is molar value, as in 10 moles to 1 mole, not 10 parts to 1 part. 1 mole of MgCl2 does not weigh the same, in grams, as 1 mole of MgSO4


1 mole of MgCl2 = 71 grams x 10 = 710 grams

1 mole of MgSO4 = 120 grams

or 6:1 by weight, 710 / 120

Have you read this:

A Homemade Magnesium Supplement
http://web.archive.org/web/20001017...work.com/fish2/aqfm/1999/june/bio/default.asp

thanx boomer, but ummmmmmmmmm ?????????????????????, i'm sorry I'm not a chemist.

 

[Boomer]

Hob that is why I posted that article = home work

what confuses us non Chemistry types


You meant to say was "what does _not_ confuses us non Chemistry types is the last paragraph of the article"

As it is Volume, so, 10 cups/ or 10 teaspoons of mag chloride and 1 cup/ or 1 teaspoon of Epsom .

 

[reverendmaynard]

But in your first post you say 6:1 by weight. Then in the quoted paragraph from the article you say they way roughly the same by volume, so shouldn't it be 6:1 by volume too?

 

[Hobster]

<a href=showthread.php?s=&postid=7198330#post7198330 target=_blank>Originally posted</a> by Boomer
Hob that is why I posted that article = home work

what confuses us non Chemistry types


You meant to say was "what does _not_ confuses us non Chemistry types is the last paragraph of the article"


As it is Volume, so, 10 cups/ or 10 teaspoons of mag chloride and 1 cup/ or 1 teaspoon of Epsom .

Yes that would be correct! (I understand the last paragraph)

As I do not have a scale, I use the volume method and mix 10 cups to 1 cup.