CHEM 219 MODULE 2 Questions with Correct Solutions
Question:
1. list prefixes for first 10 carbons in order
Answer:
meth, eth, prop, but, pent, hex, hept, oct, non, dec
Question:
2. hydrocarbon
Answer:
compounds composed of only carbon and hydrogen
Question:
3. parent chain
Answer:
longest continuous chain of carbon atoms
Question:
4. substituent
Answer:
heteroatom or group of atoms that are attached to the parent chain
Question:
5. numerical prefixes for # of identical substituent groups (2-10 in order)
Answer:
di, tri, tetra, penta, hexa, hepta, octa, nona, deca
Question:
6. alkane (with formula)
Answer:
hydrocarbon containing only single bonds between carbons, CnH2n+2
Question:
7. rules for naming alkanes
, Answer:
1. longest continues chain is parent chain
2. number parent chain starting with the end closest to the first branch
3. name using IUPAC rules for substituents
Question:
8. IUPAC systematic name order for alkanes
Answer:
locant-(prefix)SubstituentParent
Question:
9. in numbering parent chains, if there are two equally long chains...
Answer:
select the chain with the most branches coming off
Question:
10. in numbering parent chains, if the first branch point if the same distance from either end
of the parent chain...
Answer:
choose the numbering that gives the lower numbers to the most substituents
Question:
11. in numbering parent chains, if there are only 2 substituents and both are equidistant from
opposite ends of the parens chain...
Answer:
choose the numbering direction so the substituent with the higher alphabetical priority gets
the lower locant number
Question:
12. solubility and density properties of alkanes
Answer:
NOT soluble in water, low density (< 1g/ml) so floats on top of water
Question:
13. melting and boiling points properties of alkanes
Answer:
LOW MPs and BPs due to weak attractive forces between molecules
Question:
1. list prefixes for first 10 carbons in order
Answer:
meth, eth, prop, but, pent, hex, hept, oct, non, dec
Question:
2. hydrocarbon
Answer:
compounds composed of only carbon and hydrogen
Question:
3. parent chain
Answer:
longest continuous chain of carbon atoms
Question:
4. substituent
Answer:
heteroatom or group of atoms that are attached to the parent chain
Question:
5. numerical prefixes for # of identical substituent groups (2-10 in order)
Answer:
di, tri, tetra, penta, hexa, hepta, octa, nona, deca
Question:
6. alkane (with formula)
Answer:
hydrocarbon containing only single bonds between carbons, CnH2n+2
Question:
7. rules for naming alkanes
, Answer:
1. longest continues chain is parent chain
2. number parent chain starting with the end closest to the first branch
3. name using IUPAC rules for substituents
Question:
8. IUPAC systematic name order for alkanes
Answer:
locant-(prefix)SubstituentParent
Question:
9. in numbering parent chains, if there are two equally long chains...
Answer:
select the chain with the most branches coming off
Question:
10. in numbering parent chains, if the first branch point if the same distance from either end
of the parent chain...
Answer:
choose the numbering that gives the lower numbers to the most substituents
Question:
11. in numbering parent chains, if there are only 2 substituents and both are equidistant from
opposite ends of the parens chain...
Answer:
choose the numbering direction so the substituent with the higher alphabetical priority gets
the lower locant number
Question:
12. solubility and density properties of alkanes
Answer:
NOT soluble in water, low density (< 1g/ml) so floats on top of water
Question:
13. melting and boiling points properties of alkanes
Answer:
LOW MPs and BPs due to weak attractive forces between molecules
