Can you make up 20 ml of a 1:200 dilution from 2 ml of a 1:40...
Can you make up 20 ml of a 1:200 dilution from 2 ml of a 1:40 stock solution?
(a) If so, how? If not why not?
(b) If not what is the largest volume of a 1:200 you could make?
Homework Answers
A) No, can't be made.. because for conversion from 1:40 to 1:200 we need to do dilution of 1:5 of the stock solution , maximum amount which we have is 2ml of stock 1:40. So, to make 1:200 , dilution of 1:5 needs to be done. On doing this 2ml of stock should be mixed in 8ml water to make total of 10ml 1:200 dilution.
As, 1/40 x 1/5 = 1/200 , we need 4 ml of 1:40 stock minimum to mix in 16ml of water for 1:5 dilution of 1:40 to result in 1:200 dilution.
B) maximu 10 ml of 1:200 dilution could be made from 2ml of 1:40.
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