arrange sodium, iron and calcium based on the reactivity with oxygen and water. write relevant chemical equation
Answers
Answer:
Explanation:
The answer of this question can be given in terms of reactivity series of metals. A metal which is more reactive reacts with oxygen rapidly or with cold water. As the reactivity of metal decrease we need to either increase the temperature of reacting mixture or increase the temperature of water ( use of hot water instead of cold water)
The reactivity series of the metals in order of decreasing reactivity is given by:
Potassium
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Copper
Silver
Gold
Platinum
From the list above, we can see that sodium is the most reactive followed by calcium and iron which is least reactive of three.
The reaction of the metals is given below:
REACTION WITH OXYGEN
(i) Sodium:
4 Na + O₂ ⇒ 2 Na₂O
(ii) Calcium
2 Ca + O₂⇒ 2 CaO
(iii) Iron
Fe + O₂ ⇒ Fe₂O₃
REACTION WITH WATER
(i) Sodium:
2 Na + 2 H₂O ⇒ 2 NaOH + H₂
(ii) Calcium (with hot water)
2 Ca + H₂O ⇒ 2 CaOH + H₂
(iii) Iron (with steam)
2 Fe + 3 H₂O ⇒ Fe₂O₃ + 3 H₂
Answer:
Explanation:
Order of chemical reactivity of the metals :
(1) Sodium (Most reactive metal)
(2) Calcium
(3) Magnesium
(4) Zinc
(5) Iron
(6) Lead
(7) Copper (Least reactive metal)
Chemical Equations:
1) 4 Na + O₂ ⇒ 2 Na₂O
2)2 Ca + O₂⇒ 2 CaO
3)Fe + O₂ ⇒ Fe₂O₃
4)2 Na + 2 H₂O ⇒ 2 NaOH + H₂
5) 2 Ca + H₂O ⇒ 2 CaOH + H₂
6)2 Fe + 3 H₂O ⇒ Fe₂O₃ + 3 H₂