Using a pipet, 25 mL of a 0.1205 M HCl solution
was placed in a 100 mL volu metric flask and the flask
filled to the mark with water. What is the concentration
of the new solution?
To find the concentration of the new solution, we need to use the concept of dilution.
Dilution is a process in which a concentrated solution is diluted by adding a solvent (usually water) to decrease its concentration.
In this case, we are given that 25 mL of a 0.1205 M HCl solution was placed in a 100 mL volumetric flask, and then the flask was filled to the mark with water.
To determine the concentration of the new solution, we can use the formula:
C1V1 = C2V2
Where:
C1 = initial concentration of the solution
V1 = initial volume of the solution
C2 = final concentration of the solution (what we need to find)
V2 = final volume of the solution
Let's plug in the values we know:
C1 = 0.1205 M
V1 = 25 mL (0.025 L) --> converted to liters
C2 = ? (what we need to find)
V2 = 100 mL (0.100 L) --> converted to liters
Now we can rearrange the formula to solve for C2:
C2 = (C1 * V1) / V2
Substituting the known values, we have:
C2 = (0.1205 M * 0.025 L) / 0.100 L
C2 = 0.030125 M
Therefore, the concentration of the new solution is 0.030125 M.