Final answer:
To find the amount of NaCl and dextrose in an IV solution, we must know the solution's molarity and volume. For a D5W solution, we calculate moles of glucose using volume and molarity and then multiply by the molar mass to get the mass. Specific solution details are needed for precise calculations.
Step-by-step explanation:
Calculating Mass of Solute in Intravenous Solutions
To answer the student's questions regarding the amounts of NaCl and dextrose in intravenous solutions, we will apply concepts of solution concentration and stoichiometry. For example, to calculate the mass of NaCl in a IV solution labeled 'A', if it is similar to normal saline, we would use the provided molarity and volume of the solution. Whereas for calculating the mass of dextrose in the same solution, we would need information regarding its percentage composition or molarity.
For solution 'B', to find out how much dextrose has been administered, we would need to know the concentration of dextrose in the solution. If 'B' is equivalent to a D5W solution, we know this is a 5% solution by mass of dextrose. Thus, we would calculate the mass of dextrose by using the density and volume of the solution administered. Without the specific details for the IV solutions 'A' and 'B', we cannot provide a numerical answer.
For the D5W solution example, calculating the mass of glucose in a 500 mL pouсh involves determining the number of moles of glucose first by using the formula: Moles = Volume × Molarity. After finding the moles of glucose, we multiply by the molar mass of glucose to obtain the mass needed.