Answer:
The pH of pure water is 7.
This is how you calculate mass of dissolved solid
Add the Masses of the Dissolved Solids
Sum up the mass of all solids dissolved in the solution. For example, if the solution contains 5 grams of sodium chloride and 12 grams of potassium sulfate, the mass of the dissolved salts is 5 + 12 = 17 grams.