Solute Calc

Question 0

How many grams of dextrose are in a 250mL of D10W?

Answer 0

10%= 10 grams
X= 10 X 250/ 100 = 25g

Question 1

How many grams of dextrose are in a 250mL bag of D5W?

Answer 1

5% dextrose in water= 5 grams of dextrose in 100 mL

X=5% or 5g X 250/ 100 = 12.5 g

Question 2

How many grams of dextrose are in a 250ml of D25w?

Answer 2

25%= 25 g

25 X 250/ 100 = 62.5 mL

Question 3

The order is heparin 7500 units SC. You have a 5mL vial of heparin labelled 10,000 units/mL.
Determine the correct dosage to administer.

Answer 3

1mL X 7,500 units / 10,000 units = 0.75 mL

Question 4

A boy is ordered 800 mg of perdnisolone to be taken orally. What volume of mixture should be given if the stock on hand contains 500mg/5mL?

Answer 4

1mL x 800mg/ 100 mg = 8 mL

Question 5

PCN 400,000units ordered. Stock ampules contain one mega unit in 2mL (1 million)
Calculate the volume to be given.

Answer 5

2mL X 400,000 / 1,000,000 = 2mL x 4/ 10= 0.8

Question 6

A patient is ordered dexaamethasone 3 mg/kg IVI. Pt weighs 70 kg.
On hand 120 mg/ 1mL with a 5ml vial. How many mL will be given in a single dose?

Answer 6

1ml x (3x70=210 mg)/ 120 =1.8 mL

Question 7

A patient is to be given ranitidine 40 mg IVI. Stock ampules are 50mg/2 mL. What volume should be given?

Answer 7

2x40/50=1.6mL

Question 8

250mL of D5w w/ 12,000 units of heparin at 120 units/hr. calculate mL/hr

Answer 8

250mL x 120 units/ 12,000 units x 10 gtt = 25 gtt/min

Question 9

100 kg
200 mL of 5% dextrose w/ 500 mg aminophylline at 0.05 mg/kg/hr
Calculate mL/hr

Answer 9

200mL x (0.05 x 100 = 5mg/hr) / 500 mg x15= 30 gtt/min

Question 10

10 mg pethidine per hr, 500 mg of pethidine is added to 1L of D5
Calculate mL/ hr in burette, and dpm?

Answer 10

10,000/60 = 166.7 mcg/min etc