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Old 08-25-2010, 09:50 PM   #6
Darkblade48
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As long as your initial calculation was correct, then your dilutions seem OK.

Your last dilution is incorrect, however.

To 200 mL of 5 dkH, adding 40 mL of distilled water will yield 240 mL of 4.16 dkH reference solution, not a solution of 4 dkH.
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