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Sodium Borohydride + Vanillin  a. Compare boiling points. What does this say about purity? Melting Point (Literature)  110C- 117C  Melting Point Range (Start- Fully Melted) from Experiment (C)  113C - 117C  b. Calculate how many moles of vanillian was used. Use proper sigfigs. (Steps) To a 10-mL Erlenmeyer flask equipped with a stir bar add vanillin (1.300 g) followed by EtOH (2.5 mL). If the vanillin does not dissolve, gently warm the flask with your hand. In another 10-mL Erlenmeyer flask add sodium borohydride solution [3.42 M in 1.0 M NaOH] (2.5 mL). c. Calculate theoretical yeild of vanillyl alcohol in grams. Use sigfigs. (0.431g / 1.387g) x 100 = Percent Yield (%)   31.07%

Sodium Borohydride + Vanillin  a. Compare boiling points. What does this say about purity? Melting Point (Literature)  110C- 117C  Melting Point Range (Start- Fully Melted) from Experiment (C)  113C - 117C  b. Calculate how many moles of vanillian was used. Use proper sigfigs. (Steps) To a 10-mL Erlenmeyer flask equipped with a stir bar add vanillin (1.300 g) followed by EtOH (2.5 mL). If the vanillin does not dissolve, gently warm the flask with your hand. In another 10-mL Erlenmeyer flask add sodium borohydride solution [3.42 M in 1.0 M NaOH] (2.5 mL). c. Calculate theoretical yeild of vanillyl alcohol in grams. Use sigfigs. (0.431g / 1.387g) x 100 = Percent Yield (%)   31.07%

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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1. Sodium Borohydride + Vanillin 

a. Compare boiling points. What does this say about purity?

Melting Point (Literature) 

110C- 117C 

Melting Point Range (Start- Fully Melted) from Experiment (C) 

113C - 117C 

b. Calculate how many moles of vanillian was used. Use proper sigfigs. (Steps)

  1. To a 10-mL Erlenmeyer flask equipped with a stir bar add vanillin (1.300 g) followed by EtOH (2.5 mL). If the vanillin does not dissolve, gently warm the flask with your hand.
  2. In another 10-mL Erlenmeyer flask add sodium borohydride solution [3.42 M in 1.0 M NaOH] (2.5 mL).

c. Calculate theoretical yeild of vanillyl alcohol in grams. Use sigfigs.

(0.431g / 1.387g) x 100 = Percent Yield (%)  

31.07% 
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