A pharmacy technician is preparing 1 L of 3% NaCl solution. How many grams of NaCl should the technician use?

To determine how many grams of NaCl are needed for a 3% solution, it's important to understand what a 3% solution means. A 3% solution indicates that there are 3 grams of solute (in this case, NaCl) for every 100 mL of solution.

Since the technician needs to prepare 1 L of solution, it's necessary to convert liters to milliliters. There are 1000 mL in 1 L.

Next, we can set up a proportion based on the percentage:

• If 3 grams of NaCl are required for 100 mL, then for 1000 mL (which is 1 L), the calculation would be:

[

\text{Grams of NaCl} = \left(\frac{3 \text{ g}}{100 \text{ mL}}\right) \times 1000 \text{ mL}

]

Calculating this gives:

[

\text{Grams of NaCl} = 3 \times 10 = 30 \text{ g}

]

Thus, the technician should use 30 grams of NaCl to prepare 1 L of