"mEq is one thousandth of a 1 gram equivalent.
That means there are one thousand mEq in a gm(gram)
so 1/2 gm(0.5 gm) has ________ mEq's?
You can use that comparison of equivalencies to logicaly work out the dosages in gm's or mEq's once you have an order.
Forget that for now.
Your practice problem can be worked out logicaly if you don't trip over the words. The first thing to do is throw out what you don't need.
What you need:
Doctors order written as a fraction 35mEq
What is on hand written as a fraction 10mEq
You don't need all that other crap.
What do you want to end up with? You won't be measuring mEq's with a syringe will you? You need the answer in mL's right?
A rule: these are ratios so no matter where you put the numbers the total amount contained in that statement 10mEq
will be the same.... 5mL
_______ It still says that 5mL contains: 10mEq
So if 5mL's contains 10mEq's then how many mL's do you need to draw up for the docs order of 30mEq's?
That's all the order and on-hand business is about.......................sifting through the clutter for what you're looking for.
Hope it helps you feel a little better about it.