Suppose you need to prepare 1.0 L of Stock solution which musthave a concentration of 150 mg N/L. You start with solid PotassiumNitrate, KNO3 .
A. How many moles of Nitrogen should 1.0 L ofStock solution contain?
B. How many moles of KNO3 should 1.0L of stock solution contain?
C. How many grams of KNO3 will youhave to weigh out to prepare 1.0 L of stock solution? (Show ALLwork!) (Reminder: the concentration of stock must be known to 3significant figures!)
2. Another Stock solution you may have toprepare must contain 80.0 mg Phosphorus /L. Using steps similar tothose used for Nitrogen Stock solution in Question 1, find how manygrams of Potassuim Dihydrogen Phosphate(KH2PO4 ) you will need to weigh out toprepare 1.0 L of such Stock solution
