part 2 of exercise 5
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1
measurement that compares the amount of matter an object has to its volume
density
2
the density of a material is defined as its
mass per unit volume
3
density can be used to examine the unknown sample qualitatively, this measurement can use?
pycnometer
4
what does it mean when a substance rotates the plane of polarized light
substance is optically active
5
in order for a substance to exhibt optical activity, it must be what?
chiral
6
will rotate the plane of polarisation in exactly equal amounts, but in opposite direction
enantiomers
7
designated as d or (+), clockwise rotation, to the right
dextrorotatory
8
designated as I or (-), anti clockwise rotation, to the left
leorotatory
9
if only one enantiomer is present, a sample is considered to be
optically pure
10
reaction involving the breaking of bond in molecule using water
hydrolysis
11
this reacton mainly occurs betwwen an ion and water molecules and often hanges the pH of a soution
hydrolysis
12
carried out by using oxidizin agents
oxidation reaction
13
means the addition of hydrogen to a molecule or the removal of oxygen
reduction reaction
14
th functional group of an aldehyde is a carbonyl group bonded to a
hydrogen atom
15
the functional group of a ketone is a carbonyl group bonded to
two carbon atoms
16
tollens' test is also known as
siiver mirror test
17
a qualitative laboratory test used to distinguish between and aldehyde and ketone
tollens silver mirror test
18
xploits the fact that aldehydes are readily oxidized, whereas ketones are not
tollens silver mirror test
19
chemical test that can be used to check for the presence of reducing sugars in a given analyte
benedicts test
20
simple carbohydrates containing a free ketone or aldehyde functional group can be identiied with this test
benedicts test
21
iron ion reacts with phenols to form
purple complex
22
contains a phenol group, but acetyalicylic acid does not
salicylic cid
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