in this experiment the apparatus and reents needed are 25 ml bued with stand white porceline Basin magnetic stirer pH meter weighing balance 10 mL measuring cylinder plastic dropper 0.1 mol of NaOH and phalin in this video yogurt was used as a sample for the titration weigh out 10 G of the yogurt into a white porceline basin if the mass exceed by more than 0.05 G use a small spoon to remove the excess sample note down the mass of the yogurt used after the mass stabilize add 10 mL of water into the peline Basin stir the yogurt using a magnetic stirer measure the pH of the yogurt after the yogurt has been mixed thoroughly add 1 ml of the phalin to the yogurt take note of the initial volume of the NaOH in the bu titrate the yogurt with 0.1 Mo of NaOH until a Fain pink color is obtained as the yogurt is V viscous it takes longer time for the NaOH to be mixed thoroughly with the yogurt as more NaOH is added it reduces the viscosity of the yogur when the faint ping appear wait for 10 seconds to ensure that the end point is reach note down the volume of alkaline use and repeat the titration the results for the titration should agree within 0.05 ml