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CHEM1011-CHEM1031-CHEM1051-Chemistry 1A (T1 2025)

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Which of the following best describes the pH values at points A, B, and C on this titration curve?

titration curve for a weak acid with a strong base

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Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the pKa of the acid?

titration curve

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What is the pH of a buffer solution containing 0.97 mol/L ammonium chloride and 0.78 mol/L ammonia? 

pKa (NH4+) = 9.24

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This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe3+. Select the one statement below which best describes the graph. 

graph

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Is the following statements true or false?

You should not remove the pH electrode and rinse it after each addition of solution from the burette. The electrode must stay in the solution throughout the titration. 

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In the 'Buffers' part of this experiment you will prepare two buffer solutions, referred to as "Buffer A" and "Buffer B". What is the difference between these two solutions?

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Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the pH at the equivalence point in the titration?

titration curve

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Based on this titration curve for a 0.1 M  weak base with 0.1 M HCl, what is the best indicator for this titration? 

titration curve

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Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the pKa of the acid?

titration curve

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Which of the following best describes the pH values at points A, B, and C on this titration curve?

titration curve for a weak acid with a strong base

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