Properties of Ionic and Covalent Compounds

Which compound will you recommend to Ceramic Artisans? Support your answer with data.

Group the substances into two groups according to their properties.

List the properties of the two different groups that you created in number 2 (include solubility in both water and alcohol, conductivity in water and melting point).

Ionic compounds contain a metal. Covalent compounds do not contain metals. Identify each compound as ionic vs covalent (check the materials section for formulas):

Salicylic acid:

Sodium carbonate:

Sodium chloride:

Sucrose:

Now that you know which substances are ionic and which are covalent, based on your collected data, write a statement to summarize the properties of ionic compounds and another statement to summarize the properties of covalent compounds.

Water is a polar solvent. Alcohol is nonpolar. Polar substances dissolve in polar solvents and nonpolar substances dissolve in nonpolar solvents. Based on your data of which covalent substance dissolved in water, which covalent compound is polar and which is nonpolar? How do you know?

Subject

Chemistry

Format

Short answer

Unit

Bonding

Recommended rubric

Bonding Lab Rubric

1.	NaCl. It meets all criteria. It is white when dry and clear when dissolved. It has a high melting point. It dissolves in water and does not dissolve in alcohol. It conducts electricity. 











2.	Sodium carbonate and salt (NaCl) should be grouped together. They both have high melting points, high conductivity, and are insoluble in alcohol. Lauric acid and sucrose should be grouped together. They both have low melting points, low conductivity, and are soluble in alcohol.






3.	Sodium carbonate and salt (NaCl) should be grouped together. They both have high melting points, high conductivity, and are insoluble in alcohol. Lauric acid and sucrose should be grouped together. They both have low melting points, low conductivity, and are soluble in alcohol.






4.	
a.	Salicylic acid: covalent
b.	Sodium carbonate: ionic
c.	Sodium chloride: ionic
d.	Sucrose:covalent


5.	Ionic compounds have high melting points, high conductivity, are insoluble in alcohol, and soluble in water. Covalent compounds have low melting points, low conductivity, and are soluble in alcohol.








6.	Sucrose is polar covalent and lauric acid is nonpolar covalent. I know this because sucrose dissolved in water and lauric acid did not dissolve in water.

Creator

Nicole Williams

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