Question

Acid, Bases and Antacids Experiment #8 Data & Report Sheet A. Acid content of vinegar Enter the buret readings for initial and final volume of sodium hydroxide solution in the buret for each titration and calculate the concentration of acetic acid in vinegar. Titration I Titration 2 Titration 3 Initial volume 70 22 Final volume 22 32 Volume of NaOH used 112 millimoles of NaOH used (0.50 mmole/mL)(mL used) mmole of acetic acid neutralized 10.0 mL 10.0 mL 10.0 mL Volume of vinegar used Concentration of scetic acid in vinegar (moles/L or M) Average of 3 trials (M) % Concentration of acetic acid in vinegar A-1. From the structure of acetic acid given in the introduction, how many equivalents of acid are there per mole of acetic acid? A-2. Vinegar is generally considered to be about 5% acetic acid by weight. How do your results compare with the expected value? If your value is much different from the expected value, what might be the explanation for that difference?

Answer 1

O. Structure of Hectic acid (ethcooth e- I-U- I H-c-c-O-HI H Only one thatom that linked with o atom is protonable and hence basicity of this and is l. 2. Equivalent weight a molar mas . no. of equivalence a 60 gmorn = 6gnal- 1. Vinegar contains 5.1 autic acid (w/w) result concludes about 3.2.4 which is very sers having an error of 13. 2-5.01 & 100% = 364. The 15.6 probable reason can he the fact that ocetic acid is very weak arid (pka = 4.8) and so it disociates nery den, releasing ress amount of ne ions in solution, As there were less amount of the ions available for centralisation & the tipration result was also low conpared to enact.