Experiment 11: ACID-BASE TITRATION Sample Data Collection and Results Pages Volume of NaOH used in the Titration: Rough trial Trial 3 Trial 2 Trial 1 Initial reading (mL) Z1.0SML o.O0mL O.00ML o.00ML Final reading (mL) 43.15 mL 21.oom L Z1.45ML Z1.50mL Volume dispensed (mL) 21.55ML 21.Lo5mL 21.0OmL 21.SOML Average volume of NAOH used (Trials 1-3) 21.oomL O. 2012 M Molarity of NaOH MOLES MOLARITY 11 NA Unknown Vinegar # LITERS

Experiment 11: ACID-BASE TITRATION Sample Data Collection and Results Pages Volume of NaOH used in the Titration: Rough trial Trial 3 Trial 2 Trial 1 Initial reading (mL) Z1.0SML o.O0mL O.00ML o.00ML Final reading (mL) 43.15 mL 21.oom L Z1.45ML Z1.50mL Volume dispensed (mL) 21.55ML 21.Lo5mL 21.0OmL 21.SOML Average volume of NAOH used (Trials 1-3) 21.oomL O. 2012 M Molarity of NaOH MOLES MOLARITY 11 NA Unknown Vinegar # LITERS

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.21QAP

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Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH 8.3) and pink in the base form (pH 10.0). It is a weak acid with a pKa of 8.7. What fraction is in the acid form when the acid color is apparent? What fraction is in the base form when the base color is apparent?
Which of the indicators in Fig. 14-8 could be used for the titrations in Exercises 61 and 63?
Data Table: (include units!) Unknown Acid # Your NaOH concentration 0.10 Trial 1 Trial 2 Volume of Acid (in mL) 17ml 15ml Initial Buret reading for 15.00ml 0.00ml your NaOH Final Buret reading for 39.06ml 21.23ml your NaOH Total volume of NaOH 0.024L 0.021L used in titration
In the experiment, we used titration to determine the total acid content ofsamples, which we reported in terms of molarity. Reporting acidity through pHmeasurements is quite different, in that we can only measure the amount of theacid in its ionized form. You were tasked to investigate a clear aqueous solutionof an unknown monoprotic acid. You decided to use two methods togather data.Method 1 – TITRATION: A 10. mL aliquot of the sample was diluted with 25 mLdistilled water. Two drops of phenolphthalein were added and then it was titrated3.54 mL of 0.048 M standardized NaOH to the endpoint.Method 2 – pH STRIP: You took 1 mL of the sample and used a pH strip toestimate the pH, which turned out to be around 3.3. Another 1 mL of the samplewas diluted with 9 mL of water. The pH was taken again and is now around 3.8.a) Calculate the molarity of the acid using the titration data.b) If we assume that the titrated unknown is a strong acid, predict thepH of the sample.c) Using pH strip results,…
Refer to the acid-base titration curve shown below. Which point is best described as a solution containing an equimolar mixture of H₂A and HA™? F E D C B Volume of Titrant Added, mL Hd A Select one: O a. point A O b. point B O c. point C d. point D e. point E O f. point F
help find titration concentration from given data (use sig figs please)
Indicator A B C pKIndicator 3.8 9.3 5.0 Actual Transition Range (pH) 3.0 to 4.6 3.0 to 4.6 4.4 to 6.2 Consider titrating 50 mL of 0.1 mol L-1 NH4OH (Kb = 1.75 x 10-5) with 0.1 mol L-1 HCl. Based on the table above, select the most appropriate indicator to accompany this titration. Justify your choice. What is the theoretical transition range of indicators A, B and C?
Title: Potentiometric Acid Titration fitulo:Tabla de ph volumen NaOH (ml) ph Titulación NaOH 20 4.25 7.39 20.1 6.24 7.03 7.21 6.83 6.59 20.2 6.59 6.24 20.3 6.83 6 20.4 7.03 4.25 20.5 7.21 20.6 7.39 1 19.9 20 20.1 20.2 20.3 20.4 20.5 20.6 20.7 V NAOH (ml) With the previous graph determine the following: a. Determine the bufer zone on the graph b. Determine the volume at the stoichiometric point of the acid titration c. Determine the average volume d. Use the medium volume to get the pka e. From pka, get the value of ka
q eq req Use the References to access important values if needed for this question. A 27.6 mL sample of 0.355 M dimethylamine, (CH3)2NH, is titrated with 0.339 M nitric acid. At the equivalence point, the pH is Use the Tables link in the References for any equilibrium constants that are required. Submit Answer Retry Entire Group 8 more group attempts remaining Previous Email Instructor M
l Verizon LTE 7:55 PM O 4% C Question 8 of 8 Submit Which of the following accurately describes the major species in solution at point C on the titration curve for the titration of NH3 with HCl? pH C 7 В D mL H+ A) NH; and H* Tap here or pull up for additional resources A
101 Chem101 M Course Modules: Introduction to x 14.9: Buffers are Solutions thatI b Answered: The pH of a basic sol x + A app.101edu.co Question 29 of 35 Submit Which of the following combinations can be used to make a buffer? (Assume equal volumes are used.) A) 0.50 M HF and 0.20 M NaF B) 0.50 M HF and 0.50 M NaOH C) 0.50 М НF and 0.50 M НСІ D) 0.50 M HCl and 0.50 M NaF
stion 1 Calculate the pH of the titration of 50 mL 0.05 M HCI with 0.10 M NaOH d.) 24 mL NaOH e.) 24.10 mL NaOH f.) 25 mL NaOH g.) 25.10 mL NaOH h.) 26 mL NaOH Express the answers in 3 SF.