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introduction
introduction
An acid is a compound that dissolves in water to form a solution with a pH lower than 7. A base is a compound that dissolves in water to form a solution with a pH higher than 7. The pH measurement indicates how acidic or basic a substance is. pH is the measure of the number of hydrogen ions in a solution.
properties of acids and bases
properties of acids and bases
Read page 62 to the middle of page 64, up to and including Table A2.17.
Take special note of Figure A2.32 and the infoBit on page 64.
indicators
indicators
Pages 63-64 carefully and makes notes
Acid-base indicators are chemicals that are used to determine if a solution is an acid or a base.
Indicators change colour depending on the pH of a solution.
This diagram shows a memory trick for remembering the color of litmus in acid and in base.
THe colour of a universal indicator change at a variety of pH values
naming acids
naming acids
Read pages 64-65 from Naming Acids up to and including Table A2.18.
naming bases
naming bases
Read the top of page 67 to learn how to recognize and name bases. Pay special attention to Table A2.19
Naming bases is just like naming ionic compounds - name the metal first.
Examples:
Na(OH) (aq) - Sodium Hydroxide
Sr(OH)2 (aq) - Strontium Hydroxide
neutralization
neutralization
Read the rest of page 67 and the bottom of page 68.
Define in your Science notebook:
Define in your Science notebook:
neutralization
learning activities
learning activities
To review acids and bases, answer questions #1 - 7 from the Check and Reflect on page 69
Next: Once you have completed the required readings and learning activities for sections A2.4, you are now ready to complete the following lab:
Lab: "A2- Acids and Bases Lab and Investigation "
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