Acid and Base Titration Curves Video Lessons

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Concept: Understanding an Acid–Base Titration Curve.

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Concept: The Equivalence Point. 

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Example: The following questions refer to the titration curve given below. 1) The titration curve shows the titration of     a) a strong acid with a strong base    b) a weak acid with a strong base    c) a strong base with a strong acid    d) a weak base with a strong acid       2) Which point on the titration curve represents a region where a buffer solution has formed?      a) point A      b) point B      c) point C      d) point D 3) Which point on the titration curve represents the equivalence point?      a) point A      b) point B      c) point C      d) point D 4) Which of the following would be the best indicator to use in the titration?     a) erythrosin B, pKa=2.9    b) methyl blue, pKa=5.4    c) bromthymol blue, pKa= 6.8    d) o-cresonphthalein, pKa=9.0   

Problem: Two 20.0mL samples, one 0.100 M HCl and the other 0.100 M HF, were titrated with 0.200 M KOH. Answer each of the following questions regarding these two titrations.Part AWhat is the volume of added base at the equivalence point for HCl?Part BWhat is the volume of added base at the equivalence point for HF?Part CPredict whether the pH at the equivalence point for each titration will be acidic, basic, or neutral.Part DPredict which titration curve will have the lowest initial pH.

FREE Expert Solution

We are asked to answer each of the following questions regarding these two titrations.


Part A

At the equivalence point, moles of acid = moles of base. 

We use the equation below to calculate volume: 


(MV)a = (MV)b(0.100 M)(20 mL) = (0.200 M)(Vb)Vb = (0.100 M)(20 mL) (0.200 M)

Vb = 10 mL KOH

10 mL 0.200 M KOH will be needed to titrate 20 mL 0.100 M HCl 


Part B

At the equivalence point, moles of acid = moles of base. 

We use the equation below to calculate volume: 


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Problem Details

Two 20.0mL samples, one 0.100 M HCl and the other 0.100 M HF, were titrated with 0.200 M KOH. Answer each of the following questions regarding these two titrations.

Part A

What is the volume of added base at the equivalence point for HCl?


Part B

What is the volume of added base at the equivalence point for HF?


Part C

Predict whether the pH at the equivalence point for each titration will be acidic, basic, or neutral.


Part D

Predict which titration curve will have the lowest initial pH.

Learn this topic by watchingAcid and Base Titration Curves Concept Videos
All Chemistry Practice Problems Acid and Base Titration Curves Practice Problems
Q.Match each term below with its definition or description.1 The point in a titration when the added amount of standard reagent is equal to the amount o...
Q.Match each term with its definition or description. __________The point in a titration when the added amount of standard reagent is equal to the amoun...
Q.What is the most likely identity of the species undergoing titration?a. hydrobromic acid (HBr); Ka = 1.08 x 109b. acetic acid (CH3CO2H); Ka = 1.8 x 10...
Q.For the pH titration below, which of the following statements is/are correct?I The titrand is a weak base that can accept two protons.II Points C and ...
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