What is the percentage by mass of glucose in a solution which contains 18gm of glucose and 250 gm of water
% w/w = (grams solute/g solution)*100 = ?
% = [18/(18+250)]*100 = ?
To find the percentage by mass of glucose in a solution, you need to determine the mass of glucose and divide it by the total mass of the solution. Here's how you can do that:
1. Calculate the total mass of the solution by adding the mass of glucose and the mass of water:
Total mass of solution = mass of glucose + mass of water
Total mass of solution = 18 g + 250 g
Total mass of solution = 268 g
2. Calculate the percentage by mass of glucose by dividing the mass of glucose by the total mass of the solution and multiplying by 100:
Percentage by mass of glucose = (mass of glucose / total mass of solution) x 100
Percentage by mass of glucose = (18 g / 268 g) x 100
Percentage by mass of glucose ≈ 6.72%
Therefore, the percentage by mass of glucose in the solution is approximately 6.72%.