Question

solution is made by dissolving 5 gram of a potassium nitrate in 45 grams of water at room temperature. Calculate the concentration of the solution in terms of mass by mass percentage of the solution.

Answer 1

To calculate the mass by mass percentage of a potassium nitrate solution, divide the mass of the solute (potassium nitrate) by the total mass of the solution and multiply by 100%. In this case, the mass percentage of potassium nitrate in the solution is 10%.

Step-by-step explanation:

To calculate the mass by mass percentage of the solution when 5 grams of potassium nitrate is dissolved in 45 grams of water, you can use the formula:

Mass % of Solute = (Mass of Solute / Mass of Solution) × 100%

First, calculate the mass of the solution by adding the mass of the solute and the solvent:

Mass of solution = Mass of solute (potassium nitrate) + Mass of solvent (water)

Mass of solution = 5 g + 45 g = 50 g

Now, apply the mass percentage formula:

Mass % of potassium nitrate = (5 g / 50 g) × 100%

Mass % of potassium nitrate = 10%

Thus, the concentration of the potassium nitrate solution in terms of mass by mass percentage is 10%.