How many grams of water are needed to prepare 250.g of a solution that is 5.00% by mass NaCl?
A)5.00 g
B)12.5 g
C)238 g
D)245 g
E)1250 g

Question

Quizplus · Accepted Answer

To calculate the amount of water required, we first need to find out the mass of NaCl in the solution:
mass of NaCl = 5.00% x 250.g = 12.5 g

Now, to prepare the solution, we need to dissolve 12.5 g of NaCl in water. Therefore, the total mass of the solution becomes:
250.g = mass of NaCl + mass of water
250.g = 12.5 g + mass of water
mass of water = 250.g - 12.5 g = 237.5 g
Therefore, we need 237.5 g (or approximately 238 g) of water to prepare the 5.00% NaCl solution.

How Many Grams of Water Are Needed to Prepare 250