How many grams of sodium chloride are required for a 0.9% sodium chloride solution if the total volume is 1 liter?

To determine how many grams of sodium chloride (NaCl) are needed to prepare a 0.9% sodium chloride solution in a total volume of 1 liter, we start by understanding what a percentage solution means. A 0.9% solution indicates that there are 0.9 grams of sodium chloride per 100 milliliters of solution.

When dealing with 1 liter of solution, we know that 1 liter is equivalent to 1000 milliliters. To find the total amount of sodium chloride needed for 1000 milliliters, we can set up a proportion based on the percentage:

1. Calculate the amount of sodium chloride in 1000 milliliters:

• Since 0.9 grams of sodium chloride is found in 100 milliliters, we can calculate the amount in 1000 milliliters by multiplying:

• (0.9 , \text{g} \times \frac{1000 , \text{mL}}{100 , \text{mL}} = 0.9 , \text{g} \times 10 = 9 , \text{g})

Thus, to prepare a 0.9