University:
Felician University
Course:
CHEM-001 | Basic Chemistry
Academic year:

2024
Views:

55

Pages:

6
Author:

Clint W.

Dilutions Dilutions • Dilution (稀释) is the process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent 2 How to Calculate Solve using this equation: M1V1=M2V2 Molarity of concentrated Molarity of diluted Volume of solution Volume of concentrated diluted solution solution 3 Practice Problem 1 If 65.5 mL of HCl stock solution is used to make 450.0 mL of a 0.675 M HCl dilution, what is the molarity of the stock solution? 1. M1V1=M2V2 2. (0.675 M)(450.0mL) = M2 (65.5mL) 3. 4.64 M = M2 5 Practice Problem 2 How do you prepare a 250.0 mL of a 2.35 M HF dilution from a 15.0 M stock solution? 1. 2. 3. 4. M1V1=M2V2 (2.35 M)(0.2500L) = 15.0 M(V2) 0.0392 L = 39.2 mL V2 250.0 mL – 39.2 mL = 210.8 mL = 211 mL is what you need to add to solution. 7 Practice Problem 3 How much water do you need to add to prepare 500.0 mL of 1.77 M H2SO4 dilution from an 18.0 M H2SO4? 1. 2. 3. 4. M1V1=M2V2 (1.77 M)(500.0mL) = 18.0M (V2) 49.2 mL= V2 500.0 mL – 49.2 mL =450.8 mL = 451 mL 9