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Calculate the molar concentration in mol/ L of the aqueous potassium hydroxide

Calculate the molar concentration in mol/ L of the aqueous potassium hydroxide

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Calculate the molar concentration in mol/ L of the aqueous potassium hydroxide
A student used 9.925 x 102 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: 9.925 x 102 mol/L 25.00 mL phenolphthalein colorless to pale pink Indicator: Endpoint colour change: Table 1: Volume of Potassium Hydroxide Required Burette reading (mL) Trial 2 Trial 1 Trial 3 Final reading Initial reading Volume of KOH used (mL) 29.28 36.62 43.98 1.78 9.28 16.62 21.34 41.02 27.36 27.5 Average of 2 closest values to within 0.10 mL: 2. Write the molecular equation for the reaction that occurs between potassium hydroxide and hydrobromic acid. KOH + HBr → KBr t H20 Calculate the molar concentration, in mol/L, of the aqueous potassium hydroxide. 50
Transcribed Image Text:A student used 9.925 x 102 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: 9.925 x 102 mol/L 25.00 mL phenolphthalein colorless to pale pink Indicator: Endpoint colour change: Table 1: Volume of Potassium Hydroxide Required Burette reading (mL) Trial 2 Trial 1 Trial 3 Final reading Initial reading Volume of KOH used (mL) 29.28 36.62 43.98 1.78 9.28 16.62 21.34 41.02 27.36 27.5 Average of 2 closest values to within 0.10 mL: 2. Write the molecular equation for the reaction that occurs between potassium hydroxide and hydrobromic acid. KOH + HBr → KBr t H20 Calculate the molar concentration, in mol/L, of the aqueous potassium hydroxide. 50
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