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Converting ppm to mg/L

  • Thread starter Cypher49
  • Start date
  • #1
15
0

Homework Statement


A is a stable powder
B is water
C is the product of the powder being in contact with water.

A is soluble in substance B and for every gram of A 10% is C.

For a concentration of 0.5ppm of C in twenty liters of water how many grams of A do you need?


The Attempt at a Solution


I went on the assumption that ppm=mg/l.
So 0.5ppm=0.5mg/l, and I would need 10mg for the twenty liters
Which means that I would need 100mg of A.

Is this correct?

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Borek
Mentor
28,360
2,751
I would need 100mg of A.

Is this correct?
That would be my answer as well, although I find the wording of the question confusing.
 
  • #3
15
0
Thanks for the confirmation, I'm just replying to say that 100mg was indeed the correct answer.

If you don't mind me asking, how did the wording confuse you?
 
  • #4
Borek
Mentor
28,360
2,751
If 0.1g of A reacted with water, what is mass of the product? Again 0.1g? Not impossible, but counterintuitive, at least to me.
 

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