Final answer:
To prepare a 6% hetastarch, 0.9% normal saline solution for a 500ml IV bag, dissolve 4.5g of NaCl and 30ml of hetastarch, adding water as needed to reach a total volume of 500ml.
Step-by-step explanation:
To make a 6% hetastarch, 0.9% normal saline solution for a 500ml IV bag, first calculate the amount of each substance needed. For 6% hetastarch in 500ml, we need 6% of 500ml, which is:
0.06 × 500ml = 30ml hetastarch.
For 0.9% normal saline, we need 0.9% of 500ml, which is:
0.009 × 500ml = 4.5g NaCl.
Dissolve the 4.5g NaCl into enough water to make up the final volume after adding the 30ml hetastarch. Then, add the hetastarch to reach the total volume of 500ml. This dilution is similar to how medical personnel prepare IV solutions, using a stock solution and diluting it to the desired concentration.