16.1- TEST-TUBE REACTIONS Flashcards
What can a compound being acidic suggest?
carboxylic acid?
What can a compound being solid suggest?
long carbon chain or ionic bonding
What can a compound being liquid suggest?
medium length carbon chain or polar or hydrogen bonding
What can a compound being a gas suggest?
short carbon chain, little or no polarity
What can a compound being able to dissolve in water suggest?
polar groups
What can a compound not being able to dissolve in water suggest?
no polar groups
What is the alkene functional group?
-C=C
What is the alkene test?
shake with bromine water
What is the result for alkenes with bromine water?
orange colour disappears
What is the halogenoalkane functional group?
R-X
What is the test for halogenoalkanes?
- add NaOH(aq) + warm
- acidify with HNO3
- add AgNO3(aq)
What is the positive result from the halogenoalkane test?
precipitate of AgX
What is the alcohol functional group?
R-OH
What is the test for alcohols?
add acidified K2Cr2O7
What is the positive result from the alcohol test?
orange colour turns green with primary or secondary alcohols (also with aldehydes)