3. Conical Flask 7. Dropper

4. 2 gr of NaOH (o.1M) 8. 2 volumetric flasks (500ml)

5. 2 Beakers 9. Measuring pipette

7. Collect 0.1 gr of NaOH granule

8. Put the 1 gr of NaOH granule into the beaker

9. Add a water to the beaker

10. Stir it until it is dissolved

11. Put the dissolved NaOH to a 500 ml volumetric flask (1st volumetric flask)

12. Fill another 500 ml volumetric flask (2nd volumetric flask) by water and 10 ml of vinegar, then mix them (to make concentration of the vinegar lesser)

13. Add 3 small drop of phenophtalyn to the conical flask

14. Fill the 50 ml burette with 50 ml of NaOH from the 1st volumetric flask

15. Titrate the NaOH in the burette to 10 ml of vinegar in the conical flask

16. Observe until the solution in the conical flask change color into light purple (not dark purple)

17. Measure how many ml of NaOH take to make the solution change into purple color

18. Repeat step 7 until 12 for second and third timesExperiment result:<br />Titrant: NaOH<br />Concentration: 0,1 M<br />Volume:<br />1st Experiment result: 49, 1 ml<br />2nd Experiment result: 49,3 ml<br />3rd Experiment result: 49, 5 ml<br />Average volume: 49,1 ml + 49,3 ml +49,5 ml<br /> _______________________________ = 49,3 ml<br />3<br />Analyte: Vinegar<br />Volume: 10 ml<br />Concentration: V1 x M1 = V2 x M2<br />49,3 ml x 0,1 M = 10 ml x M2<br /> 4,93 : 10 = M2<br />0,493 =M2<br />0,5 M = M2<br />Analysis:<br />It takes 49,3 ml of NaOH in average, for titrating 10 ml of vinegar, and the concentration of the vinegar is 0,5 M. <br />