The dilution formula is mLa x Ma = mLb x Mb
Y mL x 14.8 M = 250 mL x 0.500 M
Solve for Y liters. I get about 8.44 mL.
So transfer 8.44 mL of the stock solution to a 250 mL volumetric flask, add enough distilled water to make to the mark of the volumetric flask, stopper, mix thoroughly, label, done.
You are a work study student in our chemistry department. Amy, your supervisor has just asked you to prepare 250ml of 0.500M NH3 solution for tomorrow's undergraduate experiment. The Stock Solutions cabinet is under the Stockroom Explorer. You will find find a 2.50 liter bottle containing 14.8M NH3. Please prepare a flask containing 250ml of a 0.500M solution. To ensure proper credit, please write your calculations in the space given below.
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