Suppose you need to prepare 1.0 L of Stock solution which must have a concentration of...

50.1K

Verified Solution

Question

Chemistry

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

Answer & Explanation Solved by verified expert

3.8 Ratings (510 Votes)

1A Given the mass of nitrogen in 1L of the stock solution 150 mg 150 mg x 1 g 1000 g 0150 g Atomic mass of nitrogen 140 gmol Hence moles of nitrogen mass atomic mass 0150 g 140 gmol 00107 mol answer See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member