Why should sodium bicarbonate solution be added slowly when
synthesizing isoamyl acetate from isoamyl alcohol and glacial
acetic acid? Write balanced equations for all reactions that take
place during the neutralization (experiment involves isoamyl
alcohol, glacial acetic acid, concentrated sulfuric acid, and 5%
aqueous sodium bicarbonate).
When a chemist treated 28 g of C4H8 with 48 grams of Cl2, she
isolated 51 g of C4H8Cl2 in pure form. No other products were
formed in this reaction. What was the % yield?
A chemist studying the reaction C2H4 (g) + I2 (g) ⇌ C2H4I2 (g)
places 3.0 mol of C2H4 and 1.0 mol of I2 in a 2.0 L vessel and
raises the temperature to 200.0 °C. At equilibrium, the
concentration of C2H4I2 is 1.51 × 10-2 M. The chemist then adds 2.0
mol of I2 to the vessel and allows it to reach a new equilibrium.
What is the concentration of C2H4I2 at the new equilibrium?
Isoamyl acetate is the primary component of artificial banana
flavor. Which signals will be in the positive phase, negative
phase, or nonexistent in normal 13C NMRof isoamyl acetate?
Fischer Esterification: Synthesis of Isoamyl Acetate (Banana
Oil)
4)
a) What is the role of sulfuric acid in the reaction?
b) Why is the mixture extracted with sodium bicarbonate? Your
answer should include a chemical equation to explain why gas
bubbles are observed and identify the gas.
c) What is brine and why is it used?
QUESTION 7
Calculate the % yield of the following reaction. You
have isolated 1.5 g of benzil from the reaction of 1.95 g of
benzoin and 1.0 g of ammonium nitrate.
75.5%
76.9%
77.6%
78.1%
The experiment to get Isoamyl Bromide from Isoamyl Alcohol was
done. chemicals used were: 9 grams (.087 moles) of sodium bromide,
8.2 mL (6.6 grams; .075 moles) of isoamyl alcohol, 8mL (14.7
grams;.150 moles) of concentrated sulfuric acid, and 8mL of 10%
aqueous sodium carbonate.
What are the limiting reagents?
What is the theoretical yield?
What is the % yield?
Consider the following reaction between sulfur trioxide and
water:
SO3(g)+H2O(l)=H2SO4(aq)
A chemist allows 61.5 g fo SO3 and 11.2 g of H2O to react. When
the reaction is finished, the chemist collects 51.0g of H2SO4.
1) Determine the theoretical yield for the reaction.
2) Determine the percent yield for the reaction.