It is necessary to know the chemical reactions occurring around us. Learner should visit the nearby and collect the following and do the following activities : Iron nail, CuSO4 , Sodium (Na), Magnesium (Mg), Sulphur (S), Phosphorus (P) (i) Add nail in CuSO4 solution. The colour of CuSO4 disappears why? (ii) How does iron react with hot and cold water? (iii) How does Na react with cold water? (iv) How does Mg react with hot and cold water? (v) Arrange Iron, Mg and Na in increasing order of activity series. (vi) List the metals and nonmetals.
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i)
When iron nails are kept dipped in copper sulfate solution for about 30 minutes, the blue color of the aqueous copper sulfate would slowly fade to become green and a brown deposition would be seen on the iron nails.
ii)
Iron also does not react with cold or hot water, but when reacts with steam, and hydrogen gas is formed.
iii)
Na reacts vigorously with cold water. This reaction gives out a tremendous amount of heat and hydrogen gas.
iv)
The reaction between magnesium and cold water is very slow. Mg reacts with hot water much faster to produce magnesium hydroxide and hydrogen gas.
v)
Na > Mg > Fe
vi)
Sodium and magnesium are metals. Sulfur and phosphorus are nonmetals.
When iron nails are kept dipped in copper sulfate solution for about 30 minutes, the blue color of the aqueous copper sulfate would slowly fade to become green and a brown deposition would be seen on the iron nails.
ii)
Iron also does not react with cold or hot water, but when reacts with steam, and hydrogen gas is formed.
iii)
Na reacts vigorously with cold water. This reaction gives out a tremendous amount of heat and hydrogen gas.
iv)
The reaction between magnesium and cold water is very slow. Mg reacts with hot water much faster to produce magnesium hydroxide and hydrogen gas.
v)
Na > Mg > Fe
vi)
Sodium and magnesium are metals. Sulfur and phosphorus are nonmetals.
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