The forensic technician at a crime scene has just prepared a luminol stock solution by adding 11.0 of luminol into a total volume of 75.0 of .
You didn't finish.
Molarity(M)=amount (mol) of solute/volume (L)of solution.
im gonna guess you have 11.0g and 75.0 mL
convert ml to L -> 75/1000=0.075L
->177 molar mass of Luminol
11.0 x(1/177)/0.075 = your answer in units of M
To find the concentration of the luminol stock solution, you need to divide the amount of luminol added by the total volume of the solution.
Here's how you can calculate it:
1. Divide the mass of luminol added (11.0 g) by the total volume of the solution (75.0 mL). This will give you the concentration of the luminol stock solution in grams per milliliter (g/mL).
Concentration (C) = mass of solute (m) / volume of solution (V)
C = 11.0 g / 75.0 mL
2. Simplify the units, if needed. In this case, milliliters (mL) can be converted to liters (L) by dividing by 1000.
C = 11.0 g / 0.075 L (since 75.0 mL = 0.075 L)
3. Calculate the concentration by dividing the mass of luminol by the volume of the solution.
C = 146.67 g/L
Therefore, the concentration of the luminol stock solution is 146.67 g/L.