Homework Answers
1. Potassium (K+) is a univalent ion and so 1mEq = 1 mmol
D5W contains 20mEq/ Liter K+
So 420ml of D5W contains : 420 (ml)/1000(ml) X 20 = 8.4mmol of K+
2. Concentration = weight/ Volume
Drug concentration in the given solution = 500(mg)/25(ml) = 20%
3. w/w = weight/weight
0.450% (w/w)= 0.450g/100g
Therefore 5g contains: 0.450/100x5=0.0225g of insulin
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