CHEM 1212L-APPLICATIONS AQUEOUS EQUILIBRIA Day: MTWRFS Date: Time Name: Summary
ID: 1029683 • Letter: C
Question
CHEM 1212L-APPLICATIONS AQUEOUS EQUILIBRIA Day: MTWRFS Date: Time Name: Summary Report Before reaction After reaction Equilibrium problem; Initial Change Equilibriunm Required Calculations 1. The pH of the buffer after adding 5.0 mL 0.10 M NaOH. (theoretical): The percent error between the experimental and theoretical pH after the addition of NaOH: The hydrogen ion concentration (M) at the assigned pH. 2. 3. 4. The concentration (M) of the salt required to prepare a buffer at the assigned pH. 5. The mass (g) of salt required to prepare 50.0 mL of this concentration. 6. The volume (mL) of the acid stock solution required to prepare 50.0 mL of the acid at the assigned concentration 7. The percent dissociation of the acid in the buffer Continued on next pageExplanation / Answer
Before reaction-The required amount of salt is weighed and transfer it into clean beaker with washing and dissolve in ti about 10 ml of DI water
After reaction-Pipet 20 ml of buffer to a clean 125 ml flask.The actual concentration of NaoH is recorded .The instructor checked the pH.
Equilibrium problem-
Initial -5ml 0.10M
Change-5 ml of 0.10 NaoH added to 20 ml of buffer