Math problem. Am I wrong?

[Twinkle007, LVN, RN]

Hello

So I had a math problem today and I am not sure if I answered it right. The question was you have a 20 ml vial with potassium concentration 10mEq/5 ml , you need to give concentration of 25mEq/500 ml how many ml will you withdraw from the vial , is the answer 12.5 ml ???

[justme1982, ADN, BSN]

Yes 12.5

[Twinkle007, LVN, RN]

Thank you , well I always doubt myself

[Niks09]

Hi,

I just finished pharm 1 and I am wondering how you solved this , isn't this a need have problem or u solved it as a ratio?

[Twinkle007, LVN, RN]

ratio 10mEq/5ml=25mEq/x

[Mainergal2000]

Hello

So I had a math problem today and I am not sure if I answered it right. The question was you have a 20 ml vial with potassium concentration 10mEq/5 ml , you need to give concentration of 25mEq/500 ml how many ml will you withdraw from the vial , is the answer 12.5 ml ???

How do you do your problems? We were taught dimensional analysis, if you have it set up right, you will come out with right answer.

[Twinkle007, LVN, RN]

Mainegal2000 the answer is 12.5 ml so that's what counts

[nursingstudent59]

25mEq | 5mL 125

__________ = ________= 12.5mL

| 10mEq 10

[lpn2B2016]

The "if & then" theory always works.

[loveofrn, BSN, RN]

What about the 500ml, is it just a distraction and why