The dilution formula is
mL1 x M1 = mL2 x M2
500 mL x 3.00 M = mL2 x 15.4
Solve for mL2, place that amount of the 15.4 M stuff in a 500 mL volumetric flask, add DI or distilled H2O to the mark on the flask, stopper, mix thoroughly, label. Done.
your supervisor has just asked you to prepare 500ml of 3.00M HNO3 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 15.4M HNO3. Please prepare a flask containing 500ml of a 3.00M solution.
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