Posted by Jessica on Saturday, September 18, 2010 at 4:38pm.
How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a 5% dextrose solution?

medicine  bobpursley, Saturday, September 18, 2010 at 5:04pm
I am wondering if your percents are by mass, or what?

medicine  Jessica, Saturday, September 18, 2010 at 5:07pm
I don't know it never said in the problem.

medicine  MathMate, Saturday, September 18, 2010 at 5:50pm
It is understood to be mass/volume for ease of dosage calculations.
Therefore whether it is 0.9% saline or simply water, the proportions are the same.
You can do the calculations as follows:
Suppose we need v ml of c1% concentrated dextrose diluted with 1000 ml of liquid to give a c2% solution,
mass of glucose added = v(c1/100) g
total volume of liquid = 1000+a
Therefore
(c2/100) = (v c1/100)/(1000+v)
Solving for v
(1000+v)c2 = v c1
v=1000c2/(c1c2) ....(1)
For the case in point,
x=50, y=5
v=1000*5/(505)
= 111.1 ml.
Equation 1 is a handy formula to remember if you need to do the same calculation often and fast.

medicine  TutorCat, Saturday, September 18, 2010 at 5:53pm
I don't think adding salt would matter. The only one thing you're focusing on is how to make that 5% dextrose solution.
(x mL)*(50) + 1000 mL = (1000 mL + x) mL)*(5)
Answer This Question
Related Questions
 medicine  50 ml of a solution of 50% dextrose is added to a liter of 0.45% NaCl...
 math  How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a...
 Math  How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a...
 Veterinary Medicine Math calculations  I was so thankful to see this exact ...
 Math  A nutritional formula calls for 500 g of dextrose in a total volume of ...
 Chemistry (isotonicity)  How many milligrams of NaCl should be used to make the...
 Chemistry  Determinne the amount of Dextrose and NaCl in 500ml of 5% DNS. (The ...
 chemistry  If 215.0 mL of water are added to a 237 mL sample of a 1.702 M ...
 math  How many mls of 45% dextrose and 15% dextrose do you need to make 780 mls...
 medicine  How would you make a 1000ml soln of 5% dextrose in LRS from 100ml of ...
More Related Questions