Thanks in advance.
A student prepared a solution of NaCl by dissolving 55.0 grams of sodium chloride in 570 mL of water. What is the percent by mass of the NaCl solution?
what is 55/(570+55) x 100
To find the percent by mass of the NaCl solution, you need to determine the mass of NaCl in the solution and divide it by the total mass of the solution, and then multiply by 100.
Step 1: Determine the mass of NaCl in the solution
The mass of NaCl in the solution is given as 55.0 grams.
Step 2: Determine the total mass of the solution
To find the total mass of the solution, you need to take into account both the mass of NaCl and the mass of water. Since the mass of water is not given directly, we can calculate it by multiplying the volume by its density.
Density of water: 1 g/mL (this is a well-known value)
Volume of water: 570 mL
Mass of water = Volume of water * Density of water = 570 mL * 1 g/mL = 570 grams
Total mass of the solution = Mass of NaCl + Mass of water = 55.0 grams + 570 grams = 625 grams
Step 3: Calculate the percent by mass of NaCl
Percent by mass = (Mass of NaCl / Total mass of the solution) * 100
Percent by mass = (55.0 grams / 625 grams) * 100 = 8.8%
Therefore, the percent by mass of the NaCl solution is 8.8%.