Group 1 [Aceson Aw(1), Anthony Low(25), Clement Chia(9), Koh Jing Yuan(17), Zhang Jie(33)

2P04 When Dilute Acid Meets Metals


Observation when metal is added to acid

Magnesium- Bubbles produced quickly.
Iron- Bubbles Produced slowly
Zinc-Bubbles formed at moderate speed.
Copper- NO bubbles formed.

Effect of gas on burning splint (all boxes) -Extinguished with a pop sound

Effect of gas on damp red litmus paper( all)- Remained red

Effect of gas on damp blue litmus paper(all) -Remained blue
Chemical formula- H2


Conclusion
1)Dilute acids react with reactive metals to produce hydrogen.

2) General equation
Metal+Dilute Acid- Salt+Hydrogen

3)We can identify that the gas produced is hydrogen by testing the gas with a burning splint. If the gas burns with a “pop” sound, it is hydrogen.

4) It has a pH value of 7 so it is neutral.

5) Magnesium, Zinc, Iron, Copper.


Exercise
Complete the following word equation.
Then write the chemical equation below each word equation.
1a )magnesium chloride + hydrogen
b Mg3 + 2HCl > MgCl2 + H2
2a hydrogen
b Fe + 2HCl > FeCl2 + H2
3a zinc chloride + hydrogen
b Zn + 2HCl > ZnCl2 + H2
4a.magnesium sulfate + hydrogen
b. Mg + H2SO4 >MgSO4 + H2
5a.iron sulfate + hydrogen
b. Fe + H2SO4>FeSO4 + H2
6a. zinc sulfate + hydrogen
b. Zn + H2SO4 > ZnSO4 + H2


7(a) magnesium + nitric acid -> magnesium nitrate + hydrogen
7(b) Mg + HNO3 -> MgNO3 + H2

8(a)iron + nitric acid -> iron nitrate + hydrogen
8(b) fe(II)+ 2HNO3 ->Fe(NO3)2 + H2

9(a) zinc + nitric acid -> zinc nitrate +hydrogen
9(b) Zn + 2HNO3 -> Zn(NO3)2 + H2