2sem Prelims Chm Lab Flashcards
The _______ and the _________ properties of many organic compounds can be used to differentiate them from inorganic compounds.
physical and chemical
properties are being shared by both _____________ compounds, there are several that are distinctly different. These can be used to tell whether a compound is __________
organic and inorganic
What are the materials use to DIFFERENCES BETWEEN ORGANIC AND INORGANIC COMPOUNDS?
sodium chloride
sugar
chloroform
alcohol
benzene
potassium chloride
What are the apparatus use to DIFFERENCES BETWEEN ORGANIC AND INORGANIC COMPOUNDS?
evaporating dish
alcohol lamp
burner
conductivity apparatus
test tubes
beaker
Differences Observed Upon Heating place a pinch of ___________ in an evaporating dish.
sodium chloride
What to do gently at first and then with a full force of the burner. And then?
Heat & observe
Repeat the procedure using a pinch of ________ instead of sodium chloride.
Sugar
Differences in Solubility
1. Test the solubility of the following substances in water:
NaCI
Chloroform
sugar
benzene
potassium chloride.
What is the difference of ORGANIC to inorganic compound?
•low melting point
•low boiling point
•Flammable
•Non- conductor of electridity
What is the difference of INORGANIC to organic compound?
•High metting point
•High Boiling point
•Non - Flammable
•Good conductor of electricity
organic compounds are no capable of ___________ because they do not form ions.
Conducting electricity
Who are the inorganic compounds and produced light?
Sodium chloride & Potassium Chloride
Who are the organic compound & didn’t produce light?
Chloroform
Alcohol
Sugar
What are the soluble to water ?
Sodium Chloride
Sugar
Potassium Chloride
What are soluble to alcohol?
Chloroform
Benzene
Sugar turns to liquid, caramelization also called?
Decomposition
What do you call if the heat is hard to penetrate?
Intermolecular Bonding
organic reactions yield compounds other than desired products due to?
side reactions
What is on standing for sometimes or when exposed to light and heat undergo partial decomposition?
Pure organic compounds
the process of theses becomes an essential laboratory technique in the preparation of pure organic compounds.
separation and purification
Organic compounds maybe separated and purified by the following methods:
solution and filtration
extraction
crystallization
sublimation
In separating solid from liquid, the most common method used is?
filtration
In filtration the method employed depends on the physical nature of the mixture such as:
volume
viscosity
particle size
amount of solid present
volatility of the liquid
Material used in filtration experiment?
distilled water
benzoic acid
sugar
denatured alcohol
filter paper
Apparatus use in filtration experiment?
test tube
funnel
Prepare a mixture of equal amount of ________ each a size of a corn grain, and mix them thoroughly.
benzoic acid and sugar,
Divide into 2 equal portions:
To one portion, add ________ shake vigorously and
filter.
5 ml of distilled water
Boil the solution and filter.
Collect equal amount of filtrate in two separate _________
Cover one ________ with a watch glass and set aside to cool slowly.
Place the other _________ in an ice bath and stir rapidly while cooling.
When crystallization is complete in both beakers, compare the type of crystals formed.
beaker
What type of filtration Results is these in filtration experiment:
Less crystals
Forms slowly
Well defined
Set aside
What type of filtration Results is these in filtration experiment:
More crystals
Crystals form quickly/ fast
Fine crystals
ice bath
How will you induce crystal formation?
Stiring
Will not totally dissolve in water and soluble high temperature of water
Benzoic acid plus water
Not ordinary temp
Benzoic acid plus sugar
In sugar, ethyl alcohol and benzene acid what is the only one that will dissolve
benzene acid
Benzoic acid dissolve in
Hot water
Two minisible
Seperatory funne
This is not soluble in water cause water is organic & solvent
Oil
is a process of removing from a mixture usually an aqueous solution, one or more substances by shaking with a liquid in which the substances to be removed are soluble, the liquid being immiscible to the aqueous solution.
Extraction
A good solvent for extraction should show a _____________ in water in which the sought organic compound is dissolved.
little or no solubility
Some solvents used are: and these do not react with the materials being extracted.
ether
carbon tetrachloride
chloroform.
This must be inert to most compounds, which can be removed by simple distillation.
solvents
The ________ is shaken with the selected solvent in a separatory funnel.
solution
Materials use in extraction
benzoic acid
sodium chloride
distilled water
chloroform
What are the Apparatus used in extraction
beaker
alcohol lamp / burner
separator funnel
evaporating dish
is a property exhibited by some solid organic and inorganic compounds, in which they are capable of being transformed directly in the vapor state without passing the liguid state.
Sublimation
What are the Materials used in sublimation:
naphthalene
sodium sulfate
filter paper
rubber band or string
pin
barium chloride
What are the apparatus use in sublimation
evaporating dish
funnel
alcohol lamp
test tubes
We cannot filter everything without the
Solvent
Color impurities removed bc of the adsorbent or
Animal charcoal
Removal of colored impurities
Discolorization
You were not able to remove the color impurities
Colorless
