Ionic and Covalent Compounds Lab Review

Flashcards for reviewing the ionic and covalent compounds lab, focusing on key concepts and results.

The purpose of the ionic & covalent compound lab is to classify unknown substances as either or .

ionic or covalent.

Ionic compounds tend to need larger amounts of energy to __ and dissociate in water.

break.

If a substance has a high melting point, is soluble in water, and conducts electricity in solution, it is most likely an __ compound.

ionic.

Covalent bonds cannot be broken into __, and exhibit weaker intermolecular forces.

free ions.

Sample A displayed properties typical of an ionic compound, such as __, soluble in water, and conductivity in solution.

high melting points.

Sample B has a low melting point, is soft and does not __ in water.

dissolve.

Sample C dissolved in water, but did not __ electricity.

conduct.

The observable patterns found indicate that ionic and polar substances dissolve in __ solvents such as water.

polar.

Sample A aligns with the rule that ionic compounds are found to be __ in water due to the strong attraction between ions and polar water molecules.

soluble.

The melting points of covalent molecular compounds are very low because they are held together by __ intermolecular forces.

weak.

Electrical conductivity in covalent compounds is absent due to their inability to break into __ and remain as neutral molecules.

ions.

Sodium iodide is composed of Na+ and I- ions and is __ soluble in water.

highly.

The melting point of sodium iodide is high because it is ionic and held together by strong __ forces.

electrostatic.

Glucose cannot conduct electricity as it is a __ covalent compound.

polar.

The melting point test indicated that Sample A melted in under __ minutes.

3.

Sample B is identified as a __ molecular compound with weak intermolecular forces.

covalent.

Conductivity tests indicated that Sample C, while soluble, was __ in terms of electrical conductivity.

non-conductive.

The time taken to melt of each sample during the melting point test is __.

recorded.

Cross-contamination can occur if the stirring rods or test tubes are not thoroughly __ between tests.

cleaned.

If the conductivity probe retains ions from a previous solution, it can affect the __.

readings.

Covalent compounds exhibit __ melting points compared to ionic compounds.

low.

Sample C is identified as covalent and is a __ molecular compound.

polar.

The presence of strong ionic bonds was suggested in compound compounds like __.

sodium chloride (NaCl).

Covalent compounds cannot dissociate into free moving __, which affects their conductivity.

ions.

Inconsistent heat distribution on the hot plate could affect the melting point test, demonstrating a source of __.

error.

The conductivity test checks for the presence of __ in the solution.

free ions.

High melting points of ionic compounds occur due to strong __ forces between charged ions.

electrostatic.

The differences in chemical bonding are reinforced by analyzing __ characteristics of substances.

physical.

Sample B's non-polar nature led to its __ in water.

insolubility.

Chemical bonding differences between ionic and covalent compounds are illustrated through the __ of unknown samples.

classification.