LAB: Properties of Acids and Bases

SCH 3U

LAB: Properties of Acids and Bases

Purpose: To investigate some of the properties of acids and bases.

Materials: Prepare your own lists after reading and RE-READING the procedure.

Apparatus: Prepare your own lists after reading and RE-READING the procedure.

Procedure:

1.  Prepare an organized observation table for all steps in the procedure.

2.  Pour the dilute hydrochloric acid into 5 test tubes to a depth of 1cm.

3.  Using a glass rod, touch drops of the acid from the first test tube to strips of red and blue litmus paper.

4.  To the reminder of the acid in test tube 1, add 2 – 3 drops of bromothymol blue indicator.

5.  To the second test tube, add 2 – 3 drops of phenolphthalein indicator.

6.  To the third test tube, add 2 – 3 drops of methyl orange indicator.

7.  To the fourth test tube, add a small piece of zinc. Trap some of the gas in the test tube and test with a burning splint.

8.  To the fifth test tube, add a pinch of sodium hydrogen carbonate and test the gas that’s produced with a burning splint.

9.  Pour dilute sodium hydroxide (base) into 5 test tubes to a depth of 1cm.

10.  Repeat steps 3 through 8 with the base.

Conclusions: State general properties of acids and bases with respect to their:

a)  Effect on specific indicators

b)  Effect on metals

c)  Effect on sodium hydrogen carbonate

Also, write balanced chemical equations for the following reactions: **NOTE: If no reaction took place then write “no reaction” on the product side of the equation. **

·  The reaction of hydrochloric acid with zinc.

·  The reaction of sodium hydroxide with zinc.

·  The reaction of hydrochloric acid with sodium hydrogen carbonate.

·  The reaction of sodium hydroxide with sodium hydrogen carbonate.