Concentration of a Solution: Beer's Law

Objective:  Determine the concentration of an unknown nickel (II) sulfate solution.

Materials:
              Logger Pro, Vernier Colorimeter, Cuvette, 20x150 mm test tubes, 30mL of .40 M NiSO4, 5 mL of NiSO4 unknown solution, two 10 mL pipets, Distilled water, Test tube rack, two 100 mL beakers

Procedure:
              First we were explained the lab and we were demonstrated the unknown solutions. But before figuring those out we were to find five trail numbers first. In this trial number we were supposed to find which one is more concentrated.
   Trail  .40 M NiSO4    Distilled H2O    Concentration                            
     1             2                        8                       .08
     2             4                        6                       .16
     3             6                        4                       .24
     4             8                        2                       .32
     5             10                      0                       .40
Open logger pro and for each solution test the vertical axis has absorbance and the horizontal is the concentration. Collect the data.

Data:
  

Conclusion:
     The concentrations of the solutions were determined in this lab.

Acid-Base Titration

Titration- The process used to determine the volume of a solution needed to react with a given amount of another substance.

Purpose- Determine the unknown concentration of HCI, the concentration of NaOH will be given.

Materials- Logger pro, vernier pH sensor, HCI solution,  .100 M NaOH solution, magnetic stirrer, pipet, distilled water, goggles

Procedure- First we used a pipet with 10 mL of the HCI solution into a 250 mL beaker and added 50 mL of distilled water. Then we placed the beaker on the hot plate with a stirrer. After that used a utility clamp to suspend a pH sensor on a ring stand and postioned the pH senor in the HCI solution. Slowly while it was warming up we added NaOH solution and graphed each point. We did this until it was a full balanced acid. We knew this happened by the color it turned. Then we figured out the numbers and knew we did a pretty good job.

Data-

               The calculations:
Concentration of NaOH at beginning:                                 0.1 M
Volume of NaOH at equivalency point:                               15.51 mL or .01551 L
Moles of NaOH at equivalency point:                                 .001551 mol
Moles of HCl at equivalency point:                                     .001551 mol
Concentration of HCl at equivalency point:                          .1551 mol/L


Conclusion:  In conclusion this lab taught me about acids and bases.