Organic Chemistry Answers

A conductivity cell having a cell constant of 0.5 cm ^-1

filled with 0.02 M solution of KCl at

298 K gave a resistance of 20.2 Ω. The water used for preparing the solution had a conductivity

of 7.1 × 10^–6 S cm^–1. Calculate the molar conductivity of 0.02 M KCl solution

Calculate the amount of chlorine gas evolved during the electrolysis of molten potassium

chloride on passing a current of 0.5 A for two hours through it.

Moles of water H2O 11.38- 7.28 = 4.1g 

Moles of anyhydrate ( CuSO4)= 7.28/159.62 = 0.0456 moles of copper sulfate

n = m/M

m = 4.1g, M = 18.02g

n = 4.1/ 18.02 = 0.227 moles of water

molecules of water 0.227(6.02 x 10^23)

                                          = 1.37 x 10^23

Answer this:

1. Your value probably does not match the actual value for the hydrate. Use the following formula to calculate the percent error for the experiment. Remember to report an absolute value. [2]

Percent error = (theoretical – experimental) x 100%

    theoretical

10 kg of water is boiled into steam. What will be the mass of steam created

What alkyl halide would yield each of the following pure alkenes upon his dehydrohalogenation by strong base.

amines

A colorless liquid, C₄H₆O, having a boiling point of 97-98°C was found to be soluble in water and also in ether. It gave a negative test for the presence of halogens, sulfur, and nitrogen. It did however,   give a positive test to 2,4-dinitrophenylhydrazine reagent. It gave a negative result when treated with ceric nitrate solution and also Tollen’s reagent. Treatment with ozone followed by hydrolysis in the   presence of zinc gave formaldehyde as one of the products. What is the structure and name of the colorless liquid?

Equation 1:       C₈H₁₈    →    C₄H₁₀    +    2C₂H₄

Equation 2:        C₂H₄    +    H₂O    →    C₂H₅OH

(ii)     Describe, as fully as you can, the conditions used for the two reactions to produce ethanol from octane.

Use Equation 1 and Equation 2 to help you with your answer.

Haloalkanes may be hydrolysed to form alcohols

state a reagent and the conditions which are required to cause a fairly fast hydrolysis reaction

1.15g of sodium reacts with an excess of chlorine, forming 1.872g of sodium chloride. What is the percentage yield of sodium chloride