Question

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol?

Answer 1

Molarity of Limonol is

M = 1.43mol/L

Step-by-step explanation:

M = mols/L

mols = g/molar mass

Therefore, determine molar mass, divide into grams luminol and divide that by 75 mL (in liters) to obtain molarity = M.

Molar mass of Limonol = 177.16 g/mol

mols = 19g / 177.16 g/mol

mols = 0.1072mol

Molarity of Limonol, M = 0.1072 mol / 0.075

M = 1.43mol/L