2P04 Assignment

Observations                     Magnesium          Iron           Zinc            Copper

Observation when metal   Bubbles are formed and      Some bubbles    Nothing is
is added to acid                 rise to the surface.               are formed          seen
                                                                                    
Effect of gas on burning   A 'pop' sound can be       The splint    
(lighted) splint                   heard and the splint         burned out      
                                          burned out
Effect of gas on damp       Damp red litmus paper remained red
red litmus paper

Effect of gas on damp       Damp blue litmus paper  Blue turned
blue litmus paper               remained blue                 red

Name of gas formed                  Hydrogen Gas

Chemical Formula of                       H2
gas

Conclusion


1. Dilute acids react with reactive metals to produce Hydrogen Gas.

2. Dilute acid + Metals --> Salt + Hydrogen Gas

3. I can identify it by looking at the bubbles formed and sound produced by the burning splint, such as a 'pop' sound when hydrogen is present.

4. It has a neutral pH.

5. Magnesium, Iron, Zinc, Copper


Exercise

1a) Magnesium + Hydrochloric Acid Magnesium Chloride + Hydrogen

1b) Mg + 2HCl MgCl2 + H2

2a) Iron + Hydrochloric Acid Iron (II) Chloride + Hydrogen

2b) Fe + 2HCl FeCl2 + H2

3a) Zinc + Hydrochloric Acid Zinc Chloride + Hydrogen

3b) Zn + 2HCl ZnCl2 + H2

4a) Magnesium + Sulfuric Acid Magnesium sulfate + Hydrogen

4b) Mg + H2SO4 MgSO4 + H2

5a) Iron + Sulfuric Acid Iron Sulfate + Hydrogen

5b) Fe + H2SO4 FeSO4 + H2

6a) Zinc + Sulfuric Acid Zinc Sulfate + Hydrogen

6b) Zn + H2SO4 ZnSO4 + H2

7a) Magnesium + Nitric Acid Magnesium Nitrate + Hydrogen

7b) Mg +2 H2NO3 Mg(NO3)2 + 2H2

8a) Iron + Nitric acid Iron(II) nitrate + Hydrogen

8B) Fe + 2H2NO3 Fe(NO3)2 + 2H2

9a) Zinc + Nitric acid Zinc nitrate + Hydrogen

9b) Zn + 2H2NO3 Zn(NO3)2 + 2H2