Question

A concentration of 355 ppm NaCl in water means that there are 355 mg of NaCl in every liter of water. Determine how many mg of NaCl are present in a 296 mL sample of this solution.

Answer 1

To find the amount of NaCl in a 296 mL sample of a 355 ppm solution, use the ratio 355 mg NaCl per 1000 mL to calculate that approximately 105 mg of NaCl would be present in the sample.

Step-by-step explanation:

To determine how many mg of NaCl are present in a 296 mL sample of a solution with a concentration of 355 ppm NaCl, we can use a proportional calculation. Since 355 ppm means there are 355 mg of NaCl in every liter (1000 mL) of water, we can set up a ratio to find the amount in 296 mL:

355 mg NaCl / 1000 mL water = X mg NaCl / 296 mL water

Solving for X gives us:

X = (355 mg NaCl × 296 mL water) / 1000 mL water

X = (105028) / 1000

X = 105.028 mg NaCl

Therefore, a 296 mL sample of this solution contains approximately 105 mg of NaCl.