General organic chemistry Questions and Answers

le On the following compound label each of the 8 carbons either as as primary secondary tertiary or quaternary carbons CI

lor 1 LDA THF 78 C 2 CH 3 Br 3 NaOH H O it 30 0 11 OH

7 Add all of the C and H to the following structure 2 pts OH Jo

11 Provide names for the following structures 4 pts C1 si dr CH3 OM OH 2

2 Complete the following nuclear reaction equation by filling in the with a particle that balances the equation A ie B He O A B C 4N C H C e D In

Which of the following will cause a decrease in solubility of solids a Crush the substance into a fine powder b Stirring the solution c Increasing the temperature d Decrease the temperature

functional groups are shown below 3 pts 0 C OH N C Entha LEC F

Write the product of the following reaction H Ph Br C H3C H Ph TOH

Which of the following reactions will produce a CO2 gas NaHCO3 HCI Ca CH3CO2H H O2 MnO2 HNO3 Zn

Part 2 BCR Answer each question in the space provided 1 If 474 6 g of CuSO SH O molar mass 249 71 g mol is dissolved in enough water to make 4 0 L of solution what is the molarity concentration show your work 2 points

The CH3NH2 molecule has 2 central or interior atoms Around carbon the molecular geometry or shape is called A and around nitrogen the molecular geometry is called

41 Indicate which represents the higher pressure in each of the following pairs A 487 mmHg or 64 745 Pa E 154 lbs inz or 9 98 atm

3 Draw separate Lewis electron dot structure for oxygen O and oxide 02 2 pts

Use the What is the name of the compound with the formula Zn3 PO4 2 What is the name of the compound with the formula SCI2 What is the formula for manganese II carbonate What is the formula for boron tribromide

Br B Br you observe in a H NMR spectrum of each compound CH3 3CI Br 3 de tafgil s uoy li toigni eirt to finis ud 2 Circle the molecule s that would give a single peak in its H NMR spectrum CH3 H3C N H3C 2C C CH3 2 SHO H3C CI H3C CH3 a napoibyr Sweled 3 What are the approximate intensities of the three lines in the triplet from the H NMR of diethyl ether CH3CH2 2O CI OR AMM HAS HWAMM SHM AMA SHM H3C CH3 A 4 The H NMR spectrum of diethyl ether CH3CH2 2O shows two signals at 3 50 1 10 ppm with relative peak areas in a 1 1 5 ratio respectively Explain this peak area ratio nislax Soupindoet eviloundzeb non 10 evilor pleob s AMM al 2 5 Define homotopic enantiotopic and diastereotopic hydrogens Give an example of a compound that would have diastereotopic hydrogens and label them noilsupe orll ei tsmW 8

9 In an experiment 10 9 g of Scandium was reacted with an excess of bromine to ield 43 5 g of scandium bromide What was the percent yield for this process Sc s Br2 1 ScBr3 s

KCI 02 If 3 45 moles of potassium chloride are produced in the reaction how many moles of oxygen are also produ mol O

What is the IUPAC name of each of the the following NH NH

The structure for 2 3 dimethyl 2 pentene is shown below CH I CH CHCHCH CH CH3 O True O False

answer the questions interpret the following Lewis diagram for NO N 0 1 For the central nitrogen atom The number of non bonding electrons The number of bonding electrons The total number of electrons 2 The central nitrogen atom A obeys the octet rule B has less than an octet C has more than an octet

What is the molarity of a solution containing 0 42 mol o a 1 35 M b 0 74 M c 0 99 M d 0 24 M

18 PCls has a trigonal bipyamidal shape Draw PCls in 3 dimensions and identify the 3 different angles associated with this structure 2 pts

What is the IUPAC name of the following compound

X Incorrect Give an IUPAC systematic or common name for the following compound O ist acetyl acetate

1 An atom undergoing a nuclear change involves a change in the atom O A number of electrons OB location of electrons C nucleus OD bonding tendencies

19 Identify 3 chiral centers on the following molecule with an 3 pts CI C H bua

A solution was made by adding 37 50 grams of NaCl to 150 00 grams of water What is the mass percent of NaCl in the solution Your Answer

Rank the following in increasing keq hydration i 0 i FCH H A H C H B CICH O H H H

In a solution the dissolves in the this process is given a special name called The process of dissolving is called When water is the solve When two metals dissolve in each other the resulting product is called a n

Which of the following shows what forms when NaCl is dissolved in water and dissociates O NaCl s O Na Cl O NaCl ONa aq Cr aq

3 71 OH 1 1 BH 3 2 H O H O 3 KMnO4 4 E OH H 5 z Ph Mg Br H D HO yo OH 224 O O Et

1 2 3 4 222 Rn 86 234Th 214 Pb 234 Tr I 234Th 90 220Ra 88 221 He He e

Now that you know how to assign oxidation numbers to atoms you can apply this knowledge to determine which compound is reduced and which compound is oxidized in a reaction that deals with non ionic compounds Consider again the following reaction CH4 g O2 g H O 1 CO2 g Determine the oxidation number on each of the compounds and then identify which reaction is the oxidation reaction in which reaction is the reduction reaction

nces to access important values if need at is the name of the compound with the formula N O at is the name of the compound with the formula Fe CN 3 mat is the formula for sulfur dioxide hat is the formula for copper II chloride

Referring to the reaction coordinate diagram below the potential energy difference between which two points defines the activation energy for the second elementary step B Potential Energy A Select one O A and D O C and D O A and E OB and C O A and B D Reaction Coordinate E

Molecular nitrogen N2 g is a light non polar molecule with a low solubility in water However N2 g is modestly soluble in water Which type of solute solvent interaction is responsible for the dissolution of N in H O Select one O a ion ion interaction O b hydrogen bonding O c dipole dipole interaction O d hydrogen bonding O e London dispersion force

Calculate the Keq from the given concentrations all are gases C H 1 000 M 0 750 M C H Cl 0 000 M 0 250 M 2 C 1 000 M 0 500 M 0 500 M used First put in the chemicals then put in the numbers The concentrations for both Cl and HCI are squared due to their coefficients 1 X 1 start equilibrium Keq Keq a H30 J H S u bb 0 6000 b OH k HS1 C C H6 v 1 S 1 75 x 106 0X1CC 1 104 x 10 5 e Cl 2 HCI 0 000 M 0 500 M d C H4Cl2 m HX 0 0 750 n x w 1 11 x 108 x 5 5 x 10 dd 0 7100 ee 1 26 x 105 1 f HCI 8 H SO3 9 1 p 2 y 0 7000 ff 4 901 r 0 250 X h HC H302 z 1 60 x 10 5 gg 7 93 1 C H302 s 0 500 t 0 333 aa 1 143 x 105 il 4 957 hh 4 942

The total number of valence electrons in the ion BrO3 is

8 Identify the alkyl groups on the long continuous carbon chain drawn below 3 pts T 3

A student performed the experiment Titration of Acetic Acid in Vinegar However he accidentally over titrated added more NaOH beyond the stoichiometric or equivalence point What effect would this have on his results The calculated concentration of acetic acid would appear higher or lower than the actual value depending on how much he over titrated The calculated concentration of acetic acid would appear lower than the actual value The calculated concentration of acetic acid would not be affected or would just be the same as the actual value The calculated concentration of acetic acid would appear higher than the actual value

13 When the following equation is balanced the coefficient for HCL is FeCl3 aq H2S g Fe2S3 s HCl aq 6 98 3 2 FeCl3 3H S 2 F S 6HCl aq Coefficient for Hll is 6

Write out the electronic configuration of Calcium Label which electrons are inner shell vs valence shell electrons 2 pts

1 Balance the following reactions in an acidic solution Identify the oxidizing and the reducing agent for each reaction Cu NO3 Cu NO

How would the graph below change if a catalyst were added to the reaction Potential Energy 1 2 Reaction Progress 3 O A Part 2 would be lower and parts 1 and 3 would be unchanged B Parts 1 and 3 would be higher and part 2 would be unchanged C Parts 1 2 and 3 would be lower D Part 1 would be higher and part 2 would be lower

Predict the product of the following reactions NH Chose the correct product of the following reaction OH H O OH HBr H SO NH B i OH O H Br l H O Br

For the reaction 1A 2B a plot of 1 A vs time is linear with a slope of 0 761 M s1 This reaction is initiated with A o 2 621 M and B 0 000 M What is the concentration of B after 31 9 seconds Please report your answer to 3 decimal places

Example Balance the following redox equation in an acidic solution Ag NO3 Ag NO

Of the following which is the strongest acid Select one O a H O O b H S O c HBr O d H Se Oe NH3

a b 3 Complete the following reaction scheme Give all product s and indicate major or minor and any relevant stereochemistry 60 points 4 points each d Major 8 4 d Br heat MUK Major Minor Br NOE beat NaCN L DMF dil HCI q F e J Cl H SO H PO4 heat CN Minor YETUD Gel racemic

Find the percent by volume of 24 5 mL of ethanol dissolved in a 53 75 mL of solution O 25 5 O 45 6 31 3 54 8