The document presents a series of acid-base titration plots, each to be matched with the correct titrant (titrating agent) and sample. The conditions given are that the equivalence point (Veq) occurs at 20.00 mL.**Problem:** Match the following acid-base titration plots with the correct titrant and sample.1. Titrant: Strong Acid; Sample: Strong Base _____________2. Titrant: Strong Base; Sample: Strong Acid _____________3. Titrant: Strong Acid; Sample: Weak Base _____________4. Titrant: Strong Base; Sample: Weak Acid _____________**Graphs Analysis:**- **Graph a:** This graph shows an initial high pH that decreases sharply around the equivalence point, indicative of a strong base being titrated by a strong acid.- **Graph b:** This graph displays an initial low pH, with a sharp increase at the equivalence point, characteristic of a strong acid being titrated by a strong base.- **Graph c:** The initial pH is moderately high, and the curve is gentle with a less abrupt drop at the equivalence point, typical of a weak base being titrated with a strong acid.- **Graph d:** This graph starts with a moderately low pH and rises smoothly with a gradual inflection point, suggesting a weak acid being titrated by a strong base.**Note:** The shape of the titration curve is determined primarily by the strength of the acid and base involved. Strong acid-base reactions exhibit sudden changes in pH near the equivalence point, while weak acid-base reactions display more gradual changes.

The question is based on the concept of titrations. We need to identify the nature of acid and base based on the curves provided.A titrant is the solution which is added from burette while a sample is taken in titration flask.1) Strong acid (titrant )vs strong base (sample)as we keep on adding acid from burette so, pH decreases during course of reaction.During titration of strong acid with strong base pH decreases abruptly at equivalence point. This abrupt decrease in pH is observed in case of titration curve-A; so that belong to strong base vs strong acid.2) Strong base (titrant )vs strong acid (sample)as we keep on adding base from burette so, pH increases during course of reaction.During titration of strong acid with strong base pH rises abruptly at equivalence point. This abrupt increase in pH is observed in case of titration curve-B; so that belong to strong base vs strong acid.3) Strong acid (titrant )vs weak base (sample)as we keep on adding acid from burette so, pH decreases during course of reaction.During titration of strong acid with weak base pH doesn't decreases abruptly at equivalence point.There is gradual decreases throughout the titration course. This is observed in case of titration curve-C; so that belong to weak base vs strong acid.4) Strong base (titrant )vs weak acid (sample)as we keep on adding base from burette so, pH increases during course of reaction.Only option left is D.During titration of weak acid with strong base pH doesn't rises abruptly at equivalence point.There is gradual increase in pH all throughout the titration. This is observed in case of titration curve-D; so that belong to strong base vs weak acid.ABCD

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2 Match the following acid-base titration plots with the correct titrant and sample. Vo=20.00 mL (1) Titrant: Strong Acid; Sample: Strong Base (2) Titrant: Strong Base; Sample: Strong Acid (3) Titrant: Strong Acid; Sample: Weak Base (4) Titrant: Strong Base; Sample: Weak Acid a. E b. T 15 F ET 10 d. volume \ 30 20

2 Match the following acid-base titration plots with the correct titrant and sample. Vo=20.00 mL (1) Titrant: Strong Acid; Sample: Strong Base (2) Titrant: Strong Base; Sample: Strong Acid (3) Titrant: Strong Acid; Sample: Weak Base (4) Titrant: Strong Base; Sample: Weak Acid a. E b. T 15 F ET 10 d. volume \ 30 20

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

The document presents a series of acid-base titration plots, each to be matched with the correct titrant (titrating agent) and sample. The conditions given are that the equivalence point (V<sub>eq</sub>) occurs at 20.00 mL.

**Problem:** Match the following acid-base titration plots with the correct titrant and sample.

1. Titrant: Strong Acid; Sample: Strong Base
_____________
2. Titrant: Strong Base; Sample: Strong Acid
_____________
3. Titrant: Strong Acid; Sample: Weak Base
_____________
4. Titrant: Strong Base; Sample: Weak Acid
_____________

**Graphs Analysis:**

- **Graph a:** This graph shows an initial high pH that decreases sharply around the equivalence point, indicative of a strong base being titrated by a strong acid.

- **Graph b:** This graph displays an initial low pH, with a sharp increase at the equivalence point, characteristic of a strong acid being titrated by a strong base.

- **Graph c:** The initial pH is moderately high, and the curve is gentle with a less abrupt drop at the equivalence point, typical of a weak base being titrated with a strong acid.

- **Graph d:** This graph starts with a moderately low pH and rises smoothly with a gradual inflection point, suggesting a weak acid being titrated by a strong base.

**Note:** The shape of the titration curve is determined primarily by the strength of the acid and base involved. Strong acid-base reactions exhibit sudden changes in pH near the equivalence point, while weak acid-base reactions display more gradual changes.

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