Unformatted text preview: (moles/liter)*(liter) = (moles/liter)*(liter) moles = moles How much of a 5 M stock solution of NaCl will you need to make up 250 mls of a 1.5 M solution? X liters = 0.075 liters (or 75 mls) Thus, we would need 0.075 liters of our 5M NaCl stock solution. The rest of the 0.25 liter volume is made up by the addition of water: 0.25 liters  0.075 liters = 0.175 liters So we would take 0.075 liters of stock 5M NaCl solution and add to that 0.175 liters of water for a final volume of 0.25 liters with a final concentration of 1.5 moles/liter (i.e. 1.5 M) What is the concentration of water? Molecular weight of H 2 O = 18.0g/mole Density of H 2 O = 1g/ml or 1000g/L Pure water is 55.6M H 2 O...
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 Fall '10
 LauraChoudry
 Chemistry, Mole, liters, stock solution

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