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helpme

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help
« on: July 17, 2004, 07:23:27 PM »
If I want a .2 Molar concentration of MgCl2 in 3 Liters how many grams of MgCl2 should I add?

chemicalLindsay

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Re:help
« Reply #1 on: July 17, 2004, 09:36:05 PM »
allright one mole of MgCl2 is 94 grams (hence magnesium 24g and two times chlorine 70g).now if we were to make a 0.2 molar solution in one litre of solution we would add a fifth of a mole of MgCl2 which equates to roughly 18.8 grams of MgCl2 and 981.2g of water.To increase this to 3 liters we simply times it by three to get 56.4g of MgCl2 and 2943.6g of water.

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Re:help
« Reply #2 on: July 17, 2004, 09:38:54 PM »
« Last Edit: July 17, 2004, 09:40:42 PM by Scratch- »
Hydrochloric acid, guaranteed to make you lose weight!

jdurg

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Re:help
« Reply #3 on: July 17, 2004, 11:00:14 PM »
allright one mole of MgCl2 is 94 grams (hence magnesium 24g and two times chlorine 70g).now if we were to make a 0.2 molar solution in one litre of solution we would add a fifth of a mole of MgCl2 which equates to roughly 18.8 grams of MgCl2 and 981.2g of water.To increase this to 3 liters we simply times it by three to get 56.4g of MgCl2 and 2943.6g of water.