Question

Determine the Concentration of the Unknown Strong Acid In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL). Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page

Is it possible to get the procedure steps with measurements to complete this lab? I have tried it multiple times now, getting the wrong final concentration each time.

Answer 1

K I am lisling out the procedures for the bitration of unknown acid with known concentration of Nãoh solution O First, we have to prepare the NaOH solution with concentration similar unknown acid. This will prestriet the fitration volume to a reasonable volume. It is mentioned in the question that the acid is with the concentration between O: 025M and 2.5M. So, let us make the Naoh solution with concentration D.IM (which is in between 0.025M to 2.5M). The stock solution of Nãoh have concentration = 10.0 M We will prepare 100 ml of 0.1M NaOH. We will use Vs = V262 V,= volume of solution with S concentration Si= initial concentration V2 = 100 ml Si=10M v volume of solution with Szconcentration S,: 0.1M . VX10M = 0,1MX100 ml S22 final concentratim. V = 0.1X100 = 1 mi ºs for marcing 100 ml of 0.7M Nãoht, ime of 10M solution must be added to 99ml distilled water @When the solution is prepared we have to take it in 50 ml borette. 10 Гон o known volume (~1= 25 me) of unknown acid must be taken in the - 250mb flase 6 0.2mL must be added to the flask as indicator. 5 Titration should be performed next. One should precord the titration volume from the buorette (final-initial volume in burette) to get volume of NaOH used for titration V2 - Titration is complete when color of solution in flask becomes pink from colonless. Now, one have to use Ni Si = V₂ S2 where y = 25 ml si is unknown Cconcentration of acid) Va recorded from fitration , S2 = 0.1M. I can not predict the titration volume 2 i think you have to por this procedure in virtual lab. You should get the correct concentration you have to perform centration of acid.