Practice Integrative Examples and Practice Problems - 4 | Unit 11: Measurement and Data Processing | IB Grade 11: Chemistry
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4 - Integrative Examples and Practice Problems

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the definition of molar absorptivity?

💡 Hint: Think about light absorption when looking at concentrations.

Question 2

Easy

Calculate the mean of the following volumes: 25.00 mL, 25.02 mL, 25.01 mL.

💡 Hint: Add all volumes and divide by the number of measurements.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does Beer’s Law state?

  • a) Absorbance is inversely proportional to concentration
  • b) Absorbance is directly proportional to concentration
  • c) Absorbance does not change with concentration

💡 Hint: Consider how solutions behave when diluted.

Question 2

True or False: The mean equivalence volume is always equal to the individual volume measurements.

  • True
  • False

💡 Hint: Recall the properties of average values.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

During a titration, the equivalence volumes measured were 25.15 mL, 25.10 mL, and 25.05 mL. Calculate the mean equivalence volume and its uncertainty. Next, calculate the amount of NaOH used to neutralize the HCl if you have 0.1000 M NaOH.

💡 Hint: Start by summing the volumes and then dividing by the number of trials.

Question 2

You have absorbance data of a dye you used in a UV-Vis calibration curve as (0.110 for 1 mg/L, 0.220 for 2 mg/L... etc.). Plot the data and determine the slope to find the molar absorptivity. Then, find the concentration of an unknown with 0.550 absorbance.

💡 Hint: Plotting tools can reveal trends in your data.

Challenge and get performance evaluation