4. Why is the no20 for stearic and oleic acid (listed above) measured at higher temperatures than all the other compounds?

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Answer questions #4 please provide and explanation. Thank you.
4. Why is the nD20 for stearic and oleic acid (listed above) measured at higher temperatures than
all the other compounds?
Transcribed Image Text:4. Why is the nD20 for stearic and oleic acid (listed above) measured at higher temperatures than all the other compounds?
Table of Refractive Index Values
Substance
Refractive
Temp
Index
(*C)
20
Vacuum
1.0000
Air
1.0003
1.33329
1.3772
20
Water
20
Isopropanol
20
n-octanol
1.429
1.4969
20
Toluene
Sugar solution (20 %w/w)
Sugar
Stearic Acid
20
1.3639
20
(40%w/w)
1.3999
1.4299
1.4449
1.3993
1.4705
20
80
Oleic Acid
60
1-butanol
1-hexanol
20
acetone
1.3588
20
Transcribed Image Text:Table of Refractive Index Values Substance Refractive Temp Index (*C) 20 Vacuum 1.0000 Air 1.0003 1.33329 1.3772 20 Water 20 Isopropanol 20 n-octanol 1.429 1.4969 20 Toluene Sugar solution (20 %w/w) Sugar Stearic Acid 20 1.3639 20 (40%w/w) 1.3999 1.4299 1.4449 1.3993 1.4705 20 80 Oleic Acid 60 1-butanol 1-hexanol 20 acetone 1.3588 20
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