Page 111 - Chemistry_Form_2

Chemistry
for Secondary Schools

5. Acids react with metal oxides or hydroxides to form salt and water only, as
shown in the following examples:
FOR ONLINE READING ONLY

Activity 5.1

Aim: To investigate the reactions of dilute acids with metals
Requirements: Test tubes, test tube rack, retort stand and clamp, wooden
splints, lighter, 2 M sulfuric acid, 2 M hydrochloric acid, 2 M
nitric acid, zinc, magnesium ribbon, lead, and copper

Procedure
1. Transfer about 5 cm of 2 M sulfuric acid, 2 M nitric acid, and 2 M
3
hydrochloric acid in three separate test tubes.
2. Add a small piece of zinc metal to each test tube, one at a time, and record
your observations.

3. Put a lighted splint at the mouth of each test tube, one at a time, as shown
in Figure 5.5, and record the observations.
4. Repeat Steps 2–3 with magnesium, lead, and copper, each at a time instead
of zinc metal.

Retort stand

Lighted splint

Test tube
Dilute acid
Metal

Figure 5.5: Set-up for the reaction of dilute acids with metals

104 Student’s Book Form Two

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