A2.3- Properties and classification of Ionic & Molecular Compounds

introduction

Ionic and molecular compounds have properties that help to distinguish them from one another. Properties such as melting points, boiling points, crystal shape, solubility in water and conductivity are properties that help to distinguish between various compounds.

Read page 51 including the infoBit and the Skill Practice section.
Read page 53, including Table A2.13.
Continue reading pages 54 and 55. Make notes on the properties of Ionic Compounds. Be sure to inspect Figures A2.23-A2.26.

Identifying ionic compounds

Ionic compounds always contain positive and negative ions. One is a cation (positive charged ion) and the second is always an anion (negative charged ion).
Inspecting the formula- noting the presence of a cation. If the formula of a compound begins with a metal ion or with NH4+ ion, the the compound is ionic.

properties of ionic compounds

solubility of ionic compounds

•Ionic compounds are always SOLID unless placed in water

•To determine the state of an ionic compound when it is placed in water, we use the solubility chart

learning activities

Do the Minds on…Using the Solubility Chart on page 58, #1 a-d and #2 a-d. Table A2.14 is the tool required for this process - It is included in your data booklet. If you have difficulty, ask a teacher for assistance!

Read bottom of page 58 and all of page 59 including the infoBit. Make notes on the properties of Molecular Compounds.
Note Figures A2.27 and A2.28 as well as Table A2.15.

properties of molecular compounds

special properties of water

Read page 60 taking note of Figure A2.29.

For more information on hydrogen bonds go to the following website: www.pearsoned.ca/school/science10 (Go to Support Website, then Unit A to find the information.)

learning activities

As review, answer Check and Reflect questions #1-5, 6a-d, 7, 8a-d on page 61.

Next: Once you have completed the required readings and learning activities for sections A2.2 and A2.3 you are now ready to complete the following lab:

Lab: "A2- Ionic and Molecular Compounds Lab and Investigation"

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