this was a question on my test that i got wrong…can someone please explain it to me?
For solution A, 50.00 mL of stock solution was diluted to 1000.0 mL.
For solution B, 10.00 mL of solution A was diluted to 250.0 mL.
For solution C, 10.00 mL of solution B was diluted to 500.0 mL.
Calculate the concentration of the stock solution and solutions A, B, and C
Favorite Answer
It’s also 1.176 mg/ml
A. Therefore, 50 ml of stock contains 58.8mg. Solution A is 58.8 mg/l.
That’s also 58.8 ug/ml
B. Therefore, 10.00 ml Solution A contains 588 ug (.588mg). Put that in a quarter of a litre and you get 2.352 mg/l – Solution B.
That’s also 2.352 ug/ml.
C. Therefore 10 ml solution B contains 23.52 ug. Put that in half a litre and you get 47.04 ug/l.
I think that’s right, but I’ve had two kids interrupt me at least 5 times during the course of typing this, so you might want to check my math.
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