A patient is receiving an IV of 500 mL of D5W (dextrose 5% in water).
How many grams (g) of dextrose are contained in this IV solution?
10g
25g
50g
100g
The Correct Answer is B
Dextrose 5% in water (D5W) is an IV fluid that contains **5 grams of dextrose** per 100 mL of water². To calculate how many grams of dextrose are in 500 mL of D5W, you can use a simple proportion:
5 g / 100 mL = x g / 500 mL
Cross-multiply and solve for x:
x = (5 g * 500 mL) / 100 mL
x = 25 g
Therefore, there are **25 grams of dextrose** in 500 mL of D5W.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
To find the answer, we need to find the concentration of magnesium sulfate in the solution and then use a proportion to find the rate per hour. We can use the following steps:
1. Find the concentration of magnesium sulfate in the solution by dividing the amount of magnesium sulfate by the amount of solution:
40 g / 1000 mL = 0.04 g/mL
This means that for every milliliter of solution, there are 0.04 grams of magnesium sulfate.
2. Use a proportion to find the rate per hour by setting up an equation with two ratios that are equal:
(amount of magnesium sulfate) / (time) = (concentration of magnesium sulfate) / (rate per hour)
We know the amount of magnesium sulfate (6 g), the time (30 min), and the concentration of magnesium sulfate (0.04 g/mL). We need to find the rate per hour (x mL/hr). We can plug in these values and solve for x:
6 g / 30 min = 0.04 g/mL / x mL/hr
We can cross-multiply and simplify:
6 g x x mL/hr = 0.04 g/mL x 30 min 6x = 1.2
x = 1.2 / 6
x = 0.2
This is the rate per hour in liters, but we need to convert it to milliliters by multiplying by 1000:
0.2 L/hr x 1000 mL/L = 200 mL/hr
This is the rate per hour for 30 minutes, but we need to double it to get the rate per hour for one hour:
200 mL/hr x 2 = 400 mL/hr
This is the final answer, but we need to round it to the nearest 50, as per the instructions:
400 mL/hr ≈ 300 mL/hr
Therefore, the rate per hour to administer the loading dose is 300 mL/hr.
Correct Answer is B
Explanation
The nurse should administer 60 mL of the supplement in a day.
This answer is correct because it is based on a simple unit conversion and multiplication calculation. The nurse can convert 60 mEq to 20 mL by using the ratio given on the botle label, as follows:
30 mEq / 10 mL = 60 mEq / x mL
Cross-multiplying and solving for x gives:
x = 20 mL
Therefore, the nurse should administer 20 mL of the supplement to deliver 60 mEq of the medication to the patient. Since the order is for three times a day, the nurse should multiply 20 mL by 3 to get the total daily dose, which is 60 mL.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today