Titration Gizmos Answer Key Flashcards

Questions and Answers

What is the pH of an HCl solution if [H+] = 0.03?

3.5

0.03

1.5 (correct)

3.0

What is the concentration of the perchloric acid when 100 mL is neutralized by exactly 46.9 mL of 0.75 M lithium hydroxide?

0.35 M (correct)

1.60 M

0.63 M

0.47 M

What is the concentration of the KOH if 50 mL of it is neutralized by dripped 0.10 M H2SO4 after 33.4 mL is added?

0.26 M

0.15 M

0.13 M (correct)

0.067 M

How much hydrochloric acid must be added to 50 mL of 0.32 M NH3 to react completely?

<p>32.0 mL</p> Signup and view all the answers

Which type of titration is shown by the titration curve below?

<p>Titration of a weak base by a strong acid</p> Signup and view all the answers

Study Notes

pH of HCl Solution

pH Calculation: For hydrochloric acid (HCl), pH is determined using the formula ( \text{pH} = -\log[H^+] ).
Given Concentration: A concentration of ( [H^+] = 0.03 ) results in a pH of 1.5.

Neutralization Reaction with Perchloric Acid

Reaction Equation: Perchloric acid (HClO4) reacts with lithium hydroxide (LiOH) to form lithium perchlorate (LiClO4) and water (H2O).
Volume and Molarity: 100 mL of HClO4 is neutralized by 46.9 mL of 0.75 M LiOH.
Concentration Calculation: The concentration of the perchloric acid is determined to be 0.35 M.

Sulfuric Acid and Potassium Hydroxide Reaction

Chemical Equation: Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows: ( H2SO4 + 2KOH \rightarrow K2SO4 + 2H2O ).
Indicator Used: Bromthymol blue indicates the pH change during titration.
Volume of H2SO4 Added: 33.4 mL of 0.10 M H2SO4 is required to react with the KOH.
Concentration of KOH: The resulting concentration of KOH is 0.13 M.

Titration of Ammonia with Hydrochloric Acid

Reaction Overview: Hydrochloric acid (HCl) reacts with ammonia (NH3) to produce ammonium chloride (NH4Cl).
Titration Details: Titrating 50 mL of 0.32 M NH3 with 0.5 M HCl.
Volume of HCl Required: A total of 32.0 mL of HCl is needed for complete neutralization of the ammonia.

Titration Curve Analysis

Titration Type Identified: The titration curve indicates a weak base (NH3) being titrated by a strong acid (HCl).
Importance of Understanding Titration Curves: Identifying the type of titration helps in predicting the pH changes and endpoint detection during the titration process.

Description

Test your knowledge on titration concepts with these flashcards, which cover key definitions and calculations involving pH and acid-base reactions. Each card provides a question along with the correct answer for easy review. Perfect for students studying chemistry or preparing for exams.