SOLUTION: Give instructions for preparing 250 ml of a 100 mM solution of Mg(OH)2 (FW=58). 

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Question 1166476: Give instructions for preparing 250 ml of a 100 mM solution of Mg(OH)2 (FW=58). 
Found 2 solutions by ikleyn, Boreal:
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Need 5.8 gm (0.1 mole) of Mg(OH)2 in 1 liter of solution for 100 mM solution.
for 250 ml, need 1/4 of that or 1.45 gm in 250 ml solution.