Question

To 500g of 5% potassium chloride solution was added 300g H20. Find the mass concentration KCl in the prepared solution.​

Answer 1

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Answer 2

To find the mass concentration of KCl in the prepared solution, we need to calculate the amount of KCl in the solution and then divide it by the total mass of the solution.

Given: Mass of the 5% potassium chloride solution (KCl) = 500g Mass of water (H2O) added = 300g

First, we need to find the amount of KCl in the original 5% solution. The concentration of the solution is given as 5%, which means there are 5g of KCl in every 100g of the solution.

So, the mass of KCl in the original solution can be calculated as: Mass of KCl = (5/100) * 500g = 25g

Next, we need to find the total mass of the prepared solution. This can be calculated by adding the mass of the original solution and the mass of water added. Total mass of the solution = Mass of KCl + Mass of water Total mass of the solution = 25g + 300g = 325g

Finally, we can calculate the mass concentration of KCl in the prepared solution. This is done by dividing the mass of KCl by the total mass of the solution and multiplying by 100 to express it as a percentage. Mass concentration of KCl = (Mass of KCl / Total mass of the solution) * 100 Mass concentration of KCl = (25g / 325g) * 100 Mass concentration of KCl ≈ 7.69%

Therefore, the mass concentration of KCl in the prepared solution is approximately 7.69%.