Halogen Derivatives Questions and Answers
Organic Chemistry
Halogen DerivativesWhat volume of 5.16 M NaOH is needed to completely titrate 689.2 mL of 2.59 M phosphoric acid
according to the equation:
H3PO4(aq) + 3 NaOH(aq) → Na3PO4(aq) + 3 H₂O(l)
mL
Organic Chemistry
Halogen DerivativesType the following formulas in the boxes below in order of increasing boiling point: RbF, CO2, CH3OH, CH₂Br.
Organic Chemistry
Halogen DerivativesWhich is NOT part of the Kinetic Molecular theory?
Pressure of a gas is a measure of the number of hits the gas molecules have on
its container.
At the same temperature, smaller particles move more quickly that larger
particles.
The motion of particles increases as the surrounding temperature increases.
The motion of particles decreases as the surrounding temperature increases
Organic Chemistry
Halogen DerivativesIn an alkyl halide, the halogen serves 2 functions
that render the alkyl halide reactive towards
substitution and elimination processes. One is
that halgens serve as leaving groups and
substitution/elimination
reactions can only occur
when a leaving group is present. What is the other
reason?
The halogens have pką values above
zero, making them weaker acids and
more likely to participate in dissolution.
The halogen repels electron density
rendering the adjacent carbon atom
nucleophilic and therefore subject to
attack by an electrophile.
The halogen is usually in an allylic
postion and therefore does not
participate in resonance, making it less
stable and more likely to react.
The halogen withdraws electron
density rendering the adjacent carbon
atom electrophilic and therefore
subject to attack by a nucleophile.
Organic Chemistry
Halogen DerivativesWhat was the driving goal of the late nineteenth-century Can Vuong resistance
movement in what is now Vietnam?
to establish a communist republic in the region
to establish a democratic republic of ethnic Vietnamese only
to ally with the British as a means of expelling the French from the region
to bring the local king back to power and expel the French
to accept French control but extract far better terms for the local population
under French rule
Organic Chemistry
Halogen DerivativesWhich of the following most contributed to the formation of the mostly independent
Dominion of Canada?
pressure by the United States government for an end to British colonial control
in all of North America
ethnic-British nationalist sentiment after the war of 1812
voluntary British devolution of power in hopes of foregoing another war of
independence
threats by France of renewed hostilities in the Americas to protect their French-
speaking former colonists
increasingly costly battles between British troops and indigenous tribes
Organic Chemistry
Halogen DerivativesPredict the major product from the addition of HBr to the following molecules:
a) 3-methyl-1-pentene
b) 2,2-dimethyl-3-hexene
Organic Chemistry
Halogen DerivativesPredict the product(s) of each of the following reactions. If you expect a racemic mixture, draw both enantiomers.
Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and charges), Atoms, and Templates toolbars.
Organic Chemistry
Halogen DerivativesAn aqueous solution of an unknown solute is tested
with litmus paper and found to be acidic. The
solution is weakly conducting compared with a
solution of NaCl of the same concentration.
Which of the following substances could the unknown be?
KOH
NH3
HNO3
KCIO₂
H3PO3
CH3COCH3
Organic Chemistry
Halogen DerivativesFor this assignment, the target compound that you should synthesize is chloro-cyclohexane. This is a substitution reaction.
List the starting materials, solvent, reagent, and products formed: cyclohexanol, Hydrochloric acid,
diethyl ether, Chlorocyclohexane, H20
Is this a substitution or an elimination reaction? Substitution reaction
What is the leaving group in this reaction? H2O
What is the nucleophile in this reaction?
Organic Chemistry
Halogen Derivatives2-Bromobutane reacts faster than 2-chlorobutane in both the Nal/acetone test and the AgNO3/EtOH test because____
bromine is a smaller atom than chlorine, allowing for a faster reaction
the conjugate of chloride has a lower pka than the conjugate of bromide
chlorine is more electronegative than bromine
bromine is a better leaving group
Organic Chemistry
Halogen DerivativesIn an SN2 reaction, how will the rate be affected if the
concentrations of substrate and nucleophile are halved
and quadrupled, respectively?
None of the answers is correct.
The rate will increase to 2 times its original value.
The rate will increase to 0.5 times its original value.
The rate will decrease to 0.5 times its original value.
The rate will decrease to 2 times its original value.
Organic Chemistry
Halogen DerivativesPredict the product composition for free-radical bromination of pentane by stating
the percentage composition of the three possible products named below:
A. 1-bromopentane
B. R-2-bromopentane
C. S-2-bromopentane
D. 3-bromopentane
Organic Chemistry
Halogen DerivativesDetermine whether each equation is balanced as written.
CH4 + O₂ CO₂ + H₂O Choose...
2 HCl + Mg(OH)2 → 2 H₂O + MgCl₂ Choose...
H₂ + O₂ → 2 H₂O Choose...
AgNO3 + NaCl →
C6H12O6 +02
Mg + H₂SO4 → MgSO4+H₂ Choose...
NaNO3 + AgCl Choose...
6CO₂ + 6H₂O Choose...
Organic Chemistry
Halogen DerivativesWhich experimental conditions would maximize the yield of choloroethane and minimize the production of polychlorinated products during the free radical chlorination of ethane?
A. equimolar amounts of chlorine & ethane
B. use an excess of chlorine
C. excess of ethane
D. excess of chlorine & long reaction time
E. equimolar amounts of chlorine & ethane and high reaction temperature
Organic Chemistry
Halogen DerivativesIn a chemistry lab test, you are asked to react a solution of bromine with each of the following unknown
liquids. Which one decolourizes the bromine solution?
a. 2,3-dimethylbutane
b. ethanoic acid
c. cyclohexene
d. n-methylmethanamide
Organic Chemistry
Halogen DerivativesA chemist must dilute 98.4 mL of 49.3 mM aqueous sodium carbonate (Na₂CO3) solution until the concentration falls to 14.0 mM. He'll do this by adding
distilled water to the solution until it reaches a certain final volume.
Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits.
Organic Chemistry
Halogen DerivativesGiven the balanced equation
a reaction:
+ Br₂ → CH₂CH₂CH₂Br
representing
CH₂CH₂CH3
+ HBr
This organic reaction is best classified
as
1) an addition reaction
2) an esterification reaction
3) a polymerization reaction
4) a substitution reaction
Organic Chemistry
Halogen DerivativesWhich is true of the reaction?
(A) The reaction proceeds by an E2 mechanism, and the reaction rate is first order in both alkyl bromide
(B) The reaction proceeds by an E2 mechanism, and the reaction rate is first order in alkyl bromide con ethanol concentration.
(C) The reaction proceeds by an E1 mechanism, and the reaction rate is first order in both alkyl brom
(D) The reaction proceeds by an E1 mechanism, and the reaction rate is first order in alkyl bromide ethanol concentration.
Organic Chemistry
Halogen DerivativesWhat volume (L) of Hydrogen (H2) could be produced by mixing 3.58 Liters(L) of Hydrochloric acid (HCI)?/¿Qué volumen (L) de hidrógeno (H2) podría producirse mezclando 3.58 litros de ácido clorhídrico (HCI)
Organic Chemistry
Halogen DerivativesA student measures the pH of a solution with a pH meter and finds the pH to be 2.4. This substance is most likely...
detergent
distilled water
bleach
stomach acid
Organic Chemistry
Halogen DerivativesWhich of the following is true of SN2 reactions?
They require two mechanism steps.
They involve two nucleophiles.
They do not require a leaving group.
Requires a backside addition
They require two electron-poor species to react.
Organic Chemistry
Halogen DerivativesThe compound ICI contains
nonpolar covalent bonds.
polar covalent bonds, with partial negative charges on the Cl atoms.
ionic bonds.
polar covalent bonds, with partial negative charges on the I atoms.
Organic Chemistry
Halogen DerivativesWhich of the following statement is not correct regarding the major product of following reaction:
CI
Alc. KOH Major product
Major product give optically inactive product mixture on reaction with Cl₂/CHCl3
O
Total 6 isomers are possible having the molecular formula of major product
Oxidation of major product with cold alkaline KMnO4 gives a MESO compound
It has more melting point as compared to one of it's isomer.
Organic Chemistry
Halogen Derivatives9. What do glycerophospholipids and sphingomyelin have in common?
a. They contain two fatty acids.
b.They have components that are linked together by the molecule glycerol.
c. They are the most common molecule in cell membranes.
d.They contain a phosphate group attached to an amino alcohol.
e.They have a common basic structure with four fused rings.