during the experiment, the students were asked to prepare a 10% (mass/mass) solution of sugar in water . ramesh dissolved 10g of sugar in 100g of water while sarika prepared it by dissolved 10g of sugar in water 100g of the solution
a) Are the two solution of the same concentration
b)compare the mass % of the two solution
To determine if the two solutions have the same concentration and compare their mass percentages, we need to calculate the concentration of each solution.
The concentration of a solution is typically expressed as a ratio between the mass of the solute (in this case, sugar) and the mass of the solution (solute + solvent, in this case, sugar + water), multiplied by 100%.
a) To determine if the two solutions have the same concentration:
For Ramesh's solution:
Mass of sugar = 10g
Mass of water = 100g
Total mass of the solution = Mass of sugar + Mass of water = 10g + 100g = 110g
Concentration of Ramesh's solution = (Mass of sugar / Total mass of the solution) * 100%
= (10g / 110g) * 100%
= 9.09%
For Sarika's solution:
Mass of sugar = 10g
Mass of the solution = 100g (the water mentioned is considered part of the solution)
Concentration of Sarika's solution = (Mass of sugar / Mass of the solution) * 100%
= (10g / 100g) * 100%
= 10%
Since Ramesh's solution has a concentration of 9.09% and Sarika's solution has a concentration of 10%, the two solutions do not have the same concentration.
b) To compare the mass percentages of the two solutions:
Ramesh's solution: 9.09%
Sarika's solution: 10%
Comparing these values, we can conclude that Sarika's solution has a higher mass percentage of sugar compared to Ramesh's solution.
Note: In this calculation, we assume that the volume change between dissolving the sugar and adding water is negligible (i.e., the initial volume of water does not change significantly after dissolving sugar).