Determine the mass of water in which you need to dissolve 2 g of nitrate to obtain a solution

Determine the mass of water in which you need to dissolve 2 g of nitrate to obtain a solution for watering indoor plants with a mass fraction of 0.1% nitrate.

Given:
m (nitrate) = 2 g
ω (NaCl) = 0.1%

Find:
m (water) -?

Solution:
1) Calculate the mass of the nitrate solution:
m solution (nitrate) = m (nitrate) * 100% / ω (nitrate) = 2 * 100% / 0.1% = 2000 g;
2) Calculate the mass of water for the solution:
m (water) = m solution (saltpeter) – m (saltpeter) = 2000 – 2 = 1998

Answer: The mass of water for the solution is 1998.