Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.
well, the final solution total mass must be
5.00/.162
uoigilu
To calculate the amount of water needed, we first need to determine the mass of the solution.
Given that the solution is 16.2% by mass, this means that 100% of the solution mass is made up of the sum of urea and water. Therefore, the mass of the solution can be calculated by dividing the mass of the urea by the percentage of the solution that is not water.
Let's start by finding the mass of the solution:
Mass of solution = Mass of urea / Percentage of solution that is not water
Mass of solution = 5.00 g / (100% - 16.2%)
Mass of solution = 5.00 g / 83.8%
Now that we have the mass of the solution, we can determine the mass of water needed. Since the solution is already 16.2% urea, the remaining percentage must be water.
Percentage of water = 100% - Percentage of urea in solution
Percentage of water = 100% - 16.2%
Percentage of water = 83.8%
Finally, we calculate the mass of water:
Mass of water = Mass of solution * (Percentage of water / 100%)
Mass of water = (5.00 g / 83.8%) * (83.8% / 100%)
Mass of water = (5.00 g) * 1
Mass of water = 5.00 g
Therefore, you would add 5.00 grams of water to 5.00 grams of urea in order to prepare a 16.2% by mass solution.