Organic Chemistry Answers

chemical equation for the reaction of 1-methylcyclohexene + Br2 in CCl4

an amonium alkansic acid salt on analysis give the following results

% c = 60.5

% h = 6.65

If 0.309 of the salt product 0.0313g of nitrogen. Determine the empirical formula of the salt

on analysis, a certain organic compound was found to contain 41% carbon, 8% hydrogen and the rest is oxygen. if it's molecular mass was 64g, find it's empirical formula

A barrel of crude oil has a volume of 42 gallons, only approximately 45% of which is processed into gasoline. If your car achieves 33 mi/gal, and you drive 36,000 miles in one year, how many barrels of crude oil are required to run your car for a year?

1.  You have 16.5g of oxalic acid, H₂C₂O₄.

1.  What amount is represented by 16.5g of oxalic acid?

Explain the chemical reactions carried out in terms of the functional groups and reaction conditions involved.

 Preparation of Aspirin – room temperature; H3PO4 catalyst

 Ester preparation – reflux

 Halogenoalkane - 

(i) For each reaction above, write a balanced displayed formula equation to show the functional groups involved. 

(ii) Write detailed mechanism where relevant.

Classify each of the following reactions?

1. Mg + HCL =MgCL₂+H₂

2.P₄O₁₀+C = P₄ + CO₂

3.AgNO₃ +NaBr = AgBr + NaNO₃

4.Ba(OH)₂+H₂SO₄ =BaSO₄+H₂O

5.CL₂+ KBr = Br₂+KCL

Explain the chemical reactions carried out in terms of the functional groups and reaction conditions involved.

 Preparation of Aspirin – room temperature; H3PO4 catalyst

 Ester preparation – reflux

 Halogenoalkane - 

(i) For each reaction above, write a balanced displayed formula equation to show the functional groups involved. 

(ii) Write detailed mechanism where relevant.

1. Which solution has the lowest pH?

A. 0.10 M HClO4

B. 0.10 M HClO

C. 0.10 M KOH

D. 0.10 M CH3NH2

2. Which solution has the highest pH?

A. 0.05 M Sr(OH)2

B. 0.10 M Sr(OH)2

C. 0.10 M NaOH

D. 0.15 M NaOH

3. What is the pH of 0.03 M acid solution? The Ka of the acid is 510-3?

A. 1.5

B. 1.9

C. 2.0

D. 2.3 

4. What is the pH of 0.10 M Ba(OH)2 solution?

A. 0.70

B. 1.00

C. 13.00

D. 13.30 

5. What is the [OH- ] of a solution with pH = 4.33?

A. 2.1104 M

B. 2.110-10 M

C. 4.7109 M

D. 4.710-5 M

6. A 0.025 M solution of compound X has pH = 2.15. Which of the following statements is true?

A. Compound X is a strong acid.

B. Compound X is a strong base.

C. Compound X is a weak acid.

D. Compound X is a weak base.

7. A base has % ionization of 0.3%. What is the pH of 0.05 M solution of the base?

A. 1.3

B. 3.8

C. 10.2

D. 12.7

Suppose we titrate 20mL of 0.100M HCHO₂ with 0.100M NaOH. Calculate the pH

1. Before any base is added

2. When half of the HCHO₂ has been neutralized

3. After a total of 15.0mL of base has been added.

Formic acid constant k_a =1.8 ×10^-4