What is the concentration (in molarity) of acetone in a solution prepared by mixing 11 mL of 4.0 M acetone, 16 mL of 0.02 M Br2, 11 mL of 1.0 M HCl, and 16 mL of water?
moles acetpme = M x L.
Add volumes and convert to liters.
molarity = moles/L of solution.
To find the concentration of acetone in the solution, we need to calculate the moles of acetone and then divide it by the total volume of the solution.
Step 1: Calculate the moles of acetone
To find the moles of acetone, we can use the formula:
moles = volume (in liters) x concentration (in Molarity)
Given:
Volume of acetone = 11 mL = 11/1000 L = 0.011 L
Concentration of acetone = 4.0 M
moles of acetone = 0.011 L x 4.0 M = 0.044 mol
Step 2: Calculate the total volume of the solution
The total volume of the solution is the sum of the volumes of all the components:
Volume of acetone = 11 mL = 11/1000 L = 0.011 L
Volume of Br2 = 16 mL = 16/1000 L = 0.016 L
Volume of HCl = 11 mL = 11/1000 L = 0.011 L
Volume of water = 16 mL = 16/1000 L = 0.016 L
Total volume of the solution = 0.011 L + 0.016 L + 0.011 L + 0.016 L = 0.054 L
Step 3: Calculate the concentration of acetone
Concentration of acetone in the solution is given by:
Concentration = moles/volume of the solution
Concentration of acetone = 0.044 mol / 0.054 L ≈ 0.81 M
Therefore, the concentration of acetone in the solution is approximately 0.81 M.