please check these Based on the protocol for the upcoming laboratory, what would
ID: 53925 • Letter: P
Question
please check these Based on the protocol for the upcoming laboratory, what would overshooting your endpoint (the addition of NaOH to your acide past the equillibrium point do to the vlaue of your unknown hydrochloric For trial of an Unknown HCl solution was added to an Erienmeyer flask along with a drop of phenophthalein. The initial buret reading was at the 2.53 ml mark. At the end of the trail, the very last drop for the titration gave a light but permanent pink color, and the final buret reading was at the 46.28 ml mark. Assuming that the titrant is a 1.0 Molar NaOH solution, what would be the molarity of the Hydrochloric Acid Solution? What is the molarity of your titrant? What is the volume of your titrant? What does the lightest shade of pink indicate about your unknown solution? What is the Molarity of your Unknown Hydrochloric Acid SolutionExplanation / Answer
Determination of the molarity of a solution of hydrochloric acid using the NaOH secondary standard.
MATERIALS:
PROCEDURE:
DATA TABLE
MEASUREMENTS
#1
#2
#3
Concentration of NaOH
_______mol/L
________mol/L
_______mol/L
Initial reading of base buret
________ mL
________ mL
________ mL
Final reading of base buret
________ mL
________ mL
________ mL
Volume of NaOH used
________ mL
________ mL
________ mL
Initial reading of acid buret
________ mL
________ mL
________ mL
Final reading of acid buret
________ mL
________ mL
________ mL
Volume of HCl used
________ mL
________ mL
________ mL
Needed:
1.Approximately 125-mL sample of HCl to titrate with your NaOH solution.
2.Four clean 125-mL or 250 -mL Erlenmeyer flasks for the HCl ( In the absence of Erlenmeyer Flask Conical flask can use)
3.25.00-mL pipet to transfer 25.00 mL of HCl solutions into each of the four flasks
4. Phenolphthalein indicator added to each HCl sample.
Clean and rinse well (with de-ionized water) three 125-mL or 250mL flasks. Use a 25.00-mL pipet to transfer 25.00- mL of HCl solutions into each of the three flasks. Add 2 drops of phenolphthalein indicator to each.
Titrate the HCl solutions with the NaOH from the burette. Again, expect that you will overshoot the endpoint on the first run. Make an effort to be much more precise on the second and third trials
DATA TABLE
MEASUREMENTS
#1
#2
#3
Concentration of NaOH
_______mol/L
________mol/L
_______mol/L
Initial reading of base buret
________ mL
________ mL
________ mL
Final reading of base buret
________ mL
________ mL
________ mL
Volume of NaOH used
________ mL
________ mL
________ mL
Initial reading of acid buret
________ mL
________ mL
________ mL
Final reading of acid buret
________ mL
________ mL
________ mL
Volume of HCl used
________ mL
________ mL
________ mL
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.