22 U4 Titration Lab Data Sheet Show all work for full credit
Nap
An unknown sample of a strong acid, HCl, is titrated with 0.20 M NaOH.
(a) Write a balanced net-ionic chemical reaction for the neutralization reaction above.
Measure a 25.0 mL sample of the acid and add two drops of phenolphthalein indicator.
(b) What color is the sample?
21.6 me
Measure the initial volume of NaOH in the burette.
Add NaOH until equivalence is reached and record observations of color change.
19.5ml
me
Vi=
22.6m 24. 5too much 23.90ML
(c) Calculate the molarity of the unknown acid.
Record the finial volume of NaOH in the burette once equivalence is reached. Vf= 24,5
Equivalence volume (Veq) = Vf- Vi.
Calculate Veg 2,9
24.5-21.6=
Oct 25
2,9 m² 0
(1) 2m²
24. Sm
(d) Determine the number of moles in 25.0 mL of the HCl sample.
(e) Determine the mass of chlorine (Cl) in the sample.
