Here's how to calculate the parts per million (ppm) of sodium chloride in the solution:

1. Calculate the total mass of the solution:

* Total mass = mass of solute (NaCl) + mass of solvent (water)

* Total mass = 25 g + 200 g = 225 g

2. Convert the mass of solute to milligrams:

* 1 g = 1000 mg

* Mass of NaCl in mg = 25 g * 1000 mg/g = 25000 mg

3. Calculate the ppm:

* ppm = (mass of solute in mg / total mass of solution in g) * 1,000,000

* ppm = (25000 mg / 225 g) * 1,000,000

* ppm ≈ 111,111 ppm

Therefore, the solution contains approximately 111,111 ppm of sodium chloride.