To increase the yield in agriculture, 10 kg of 10% KNO3 solution is introduced into the soil.

| September 6, 2021 | education

To increase the yield in agriculture, 10 kg of 10% KNO3 solution is introduced into the soil. Determine the mass of N2 in this soil.

We have a 10% potassium nitrate (KNO3) solution. The mass of this solution is 10 kilograms. So you need to find the mass of potassium nitrate in the solution. For the reaction equation, 10 kg – 100%, and X – 10%, add up and solve the proportion:
10 * 10/100; hence X = 1 kg of potassium nitrate we have in solution, the rest of the mass is water. Now we are looking for how many grams of nitrogen is contained in 1 kg of potassium nitrate. The mass of 1 mole of potassium nitrate is 101, in this compound only 14 g comes to nitrogen. If in 101 grams of KNO3 we have 14 grams of nitrogen, then in 1000 grams – X. Hence X = 14 * 1000 / 101. X = 138.6 – mass nitrogen in the soil.



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