TITRATION LAB

We completed a titration lab! The purpose of this lab was to determine the molarity of a sulfuric acid in NaOH. First we began the procedure by placing 20 mL of diluted sulfuric acid into a flask. We then added three drops of the indicator Phenolphthalein, to the solution. We then placed a small magnet in the flask to secure it to a magnetic plate. The magnetic plate constantly stirred the solution. Above the flask, we placed a buret with NaOH and slowly added in the NaOH. The indicator that we added turned light pink, allowing us to know the acid had been neutralized.

The added NaOH turned the indicator pink but quickly dispersed. This picture was taken while the NaOH was mixing. The final color was not this dark.

The color of pink desired was light pink, not dark pink. We obtained the light pink color in two trials in which we added 18.4 mL of NaOH. 

   

Based on our calculations we used .0184 mol of NaOH. We multiplied the mole ratio of H2SO4 to NaOH, getting the number .0092 moles of H2SO4. We then divided by the whole, .020L to get the molarity .46M  of H2SO4.