A student used 9.925 x 10-2 mol/L hydrobromic acid to standardize an aqueous solution of potassium hydroxide and obtained the following titration data using phenolphthalein as an indicator: Concentration of HBr used: Volume of HBr used: Indicator: Endpoint colour change: Table 1: Volume of Potassium 9.925 x 10-2 mol/L 25.00 mL phenolphthalein colorless to pale pink Hydroxide Required Trial 1 29.28 1.78 Final reading Initial reading Volume of KOH used (mL) Average of 2 closest values to within 0.10 mL: Burette reading (mL) Trial 2 36.62 9.28 Trial 3 43.98 16.62
A student used 9.925 x 10-2 mol/L hydrobromic acid to standardize an aqueous solution of potassium hydroxide and obtained the following titration data using phenolphthalein as an indicator: Concentration of HBr used: Volume of HBr used: Indicator: Endpoint colour change: Table 1: Volume of Potassium 9.925 x 10-2 mol/L 25.00 mL phenolphthalein colorless to pale pink Hydroxide Required Trial 1 29.28 1.78 Final reading Initial reading Volume of KOH used (mL) Average of 2 closest values to within 0.10 mL: Burette reading (mL) Trial 2 36.62 9.28 Trial 3 43.98 16.62
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter14: Acid- Base Equilibria
Section: Chapter Questions
Problem 118CP: Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH,...
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How do i determine the ml of KOH? (Picture posted)
A student used 9.925 x 10-2 mol/L hydrobromic acid to standardize an aqueous solution of potassium hydroxide and obtained the following titration data using phenolphthalein as an indicator:
Concentration of HBr used: 9.925 x 10-2 mol/L
Volume of HBr used: 25.00 mL
Indicator: phenolphthalein
Endpoint colour change: colorless to pale pink
Transcribed Image Text:A student used 9.925 x 10-² mol/L hydrobromic acid to standardize an aqueous solution of
potassium hydroxide and obtained the following titration data using phenolphthalein as an
indicator:
Concentration of HBr used:
Volume of HBr used:
Indicator:
Endpoint colour change:
9.925 x 10-2 mol/L
25.00 mL
phenolphthalein
colorless to pale pink
Table 1: Volume of Potassium Hydroxide Required
+
Trial 1
29.28
1.78
Final reading
Initial reading
Volume of KOH used (mL)
Average of 2 closest values to within 0.10 mL:
Burette reading (mL)
Trial 2
36.62
9.28
Trial 3
43.98
16.62
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