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Ignition Test

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by

Marc Chaddie Cristobal

on 19 November 2013

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Transcript of Ignition Test

Post-Laboratory Discussion in Chemistry
Ignition Test
Solubility Test
Conductivity Test
Generalization
Flammability
Ethyl Alcohol
Observation

Ethyl alcohol caught into flames when it made contact with flame. After several seconds, the ethyl alcohol evaporated.

Therefore, ethyl alcohol is flammable.
Water
Observation

Water did not catch on fire even when it is in contact with a flame. And due to the increasing temperature caused by the flame, the water evaporated.

Therefore, water is not flammable.
(Difference Between Inorganic and Organic Compounds)
Charring
Sucrose
Observation

Sucrose became a boiling, black substance when heated over a bunsen burner. Some part of the flame turned green while heating and after a few seconds while it was being heated, sucrose solidified.
NaCl
Observation

NaCl caught fire due to the high temperature caused by the bunsen burner, and the substance turned gray after the flame disappeared and returned to its white color.
Naphthalene in water
Observation
Naphthalene did not dissolve in water even if it was vigorously shaken for 1-2 minutes.

Therefore, naphthalene is insoluble in water.
Naphthalene in ether
Observation
Naphthalene dissolved quickly after it was vigorously shaken for several seconds.

Therefore, naphthalene is soluble in ether.
NaCl in water
Observation
NaCl dissolved in water but it took quite some time even though the test tube was vigorously shaken.

Therefore, NaCl is soluble in water.
NaCl in ether
Observation
NaCl did not dissolve in ether even if the test tube was vigorously shaken for a couple of minutes.

Therefore, NaCl is insoluble in water.
1M Sucrose
Observation
Sucrose is a non-electrolyte substance because the test shows that the light was not lit even when the voltage is at its peak.
1M NaCl
Observation
NaCl is an electrolyte substance because the light was lit brightly.
95% Ethyl Alcohol
Observation
Ethyl Alcohol is a non-electrolyte substance because the test shows that the light was not lit when the power was on.
1. What element is indicated by the residue formed in the charring test?
3. What type of chemical bonding is present in sucrose and ethyl alcohol? Justify your answer.
2. How do you account for the observed solubilities of naphthalene and NaCl in water and in ether based on the nature of the bonds that exists in them?
(State the observed properties of Organic compounds)
Full transcript