REAC0714: Srudying SN1 and SN2 Reactions: Nudeophilic Substitution 150 6. The li
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Question
REAC0714: Srudying SN1 and SN2 Reactions: Nudeophilic Substitution 150 6. The limiting reagent in the production of 1-bromobutane is 1-butanol. Calculate the theoretical yield of 1-bromobutane for your experiment. Record your results here and in your laboratory notebook. 7. How does the Syl reaction in this experiment cause the acid-base indicator, phenolphthalein, to change color? Briefly explain. 8. Why is it important that the volume of 0.5M NaOH be measured exactly? anit 9. Which is the stronger acid, HCI or HBr? Which is the stronger base, CI or Br ?Explanation / Answer
I need to know the experiment to answer questions 6-8. I will answer question # 9.
9. The strength of an inorganic halogen acid depends on the strength of the H-X (X = Cl, Br, I) bond. The greater the electronegativity of X atom, the stronger is the ability of X to draw the electron pair of the H-X bond toward itself and consequently, the H atom is tightly bound to X and is released with difficulty. Br atom is less electronegative than Cl; hence, H-Br bond is less strong as compared to H-Cl bond and hence, HBr is a stronger acid (since the proton is released easily due to lower electronegativity of Br).
The stronger the Bronsted acid, the weaker is the conjugate base. Cl- and Br- are the conjugate bases of HCl and HBr respectively. The strength of the conjugate base is inversely proportional to the strength of the acid. Since HBr is a stronger acid, hence, Br- is a weaker base and hence, Cl- is the stronger base.
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