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A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of ethylene glycol in a boiling tube and heated the sample. If the boiling point of the mixture was found to be 201.4 °C, what is the molar mass of W? A buffer is prepared by adding together 600 mL of 1.64 M hydrocyanic acid and 850 mL of 0.98 M sodium cyanide. Given that the new pH of the buffer is 9.01 after 25 mL of sulfuric acid is added, calculate the concentration of the sulfuric acid.

A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of ethylene glycol in a boiling tube and heated the sample. If the boiling point of the mixture was found to be 201.4 °C, what is the molar mass of W? A buffer is prepared by adding together 600 mL of 1.64 M hydrocyanic acid and 850 mL of 0.98 M sodium cyanide. Given that the new pH of the buffer is 9.01 after 25 mL of sulfuric acid is added, calculate the concentration of the sulfuric acid.

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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+ (a) A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of ethylene glycol in a boiling tube and heated the sample. If the boiling point of the mixture was found to be 201.4 °C, what is the molar mass of W? (b) A buffer is prepared by adding together 600 mL of 1.64 M hydrocyanic acid and 850 mL of 0.98 M sodium cyanide. Given that the new pH of the buffer is 9.01 after 25 mL of sulfuric acid is added, calculate the concentration of the sulfuric acid.
Transcribed Image Text:+ (a) A laboratory technician dissolved 6.797 g of compound W (a non-electrolyte) in 15.00 mL of ethylene glycol in a boiling tube and heated the sample. If the boiling point of the mixture was found to be 201.4 °C, what is the molar mass of W? (b) A buffer is prepared by adding together 600 mL of 1.64 M hydrocyanic acid and 850 mL of 0.98 M sodium cyanide. Given that the new pH of the buffer is 9.01 after 25 mL of sulfuric acid is added, calculate the concentration of the sulfuric acid.
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