Posted by Sam on Tuesday, May 10, 2011 at 9:50pm.
You want 5.50 mg/mL and you want 450 mL. So mg needed = 5.50 mg/mL x 450 = ??mg
Convert that to grams. Then convert that many g K^+ to KNO3.
g KNO3 = g K^+ needed x (molar mass KNO3/atomic mass K^+) = ??
For M, convert grams KNO3 to moles. moles = grams/molar mass, then M = moles/L.
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