Sunday, July 29, 2012

Reaction of metals with dilute hydrochloric sulphuric nitric acid


Dilute Acids reacts with metal














Reaction of metals with dilute hydrochloric acid : 
Metals react with dilute hydrochloric acid to produce hydrogen with the formation of their respective metallic chlorides.

Experiment 6 :
Take small pieces of magnesium, zinc, iron and copper in separate test tubes. Add 10 ml of dilute hydrochloric acid to each of them. Observe the reactions that take place. Magnesium, zinc and iron react with dilute hydrochloric acid to produce hydrogen. 
Reaction of Mg ,Zn, Fe with dilute acids
Metals usually react with hydrochloric acid. But there is difference in the reactivity. In the above reactions which appear to be similar, magnesium reacts readily compared to zinc and copper. Noble metals do not react with hydrochloric acid at all.
Reaction of Mg, Zn, Fe, Cu with dilute Hydrochloric acid
The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. The reactivity of zinc is lower than that of magnesium. Hence the reaction with zinc is slower. Iron takes more time to react with dilute hydrochloric acid as it has the lowest reactivity among the three.

Reaction of metals with dilute Nitric acid :
Metals produce hydrogen with very dilute nitric acid (iron is an exception) along with metallic nitrates. 
Reaction of Zn, Mg with Dilute Nitric acid
Metals produce nitrates and nitric oxide with moderately concentrated nitric acid.
Reaction of Copper wtih Concentrated Nitric acid
Metals produce metallic nitrates and nitrogen dioxide with concentrated nitric acid. 
Reaction of Copper wtih Concentrated Nitric acid

Reaction of metals with dilute Sulphuric acid :
Just like dilute hydrochloric acid, dilute sulphuric acid also produces hydrogen with the formation of their respective metallic sulphates.
Reaction of Mg, Zn, Fe with  Dilute sulphuric acid
Reaction of metals with chlorine : 
When heated aluminium powder is sprinkled in a jar of chlorine reaction takes place to form aluminium chloride. During the reaction flashes are seen in the gas. 
Reaction for Aluminium Powder
Iron and copper react with chlorine to form their respective chlorides.
Reaction of iron and copper with Chlorine
From the above examples it can be inferred, that, metals normally react with chlorine to form their respective chlorides. But the reactivity is different.

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