Question

Classify these reactions according to the type discussed in the chapter.

b) Ca2+ + Co32- -> CaCo3
d) 2CCl4 + CrO42- -> 2CoCl2+ CrO2Cl2+2Cl-
e) Ca+ F2-> CaF2
f) 2Li+H2-> 2LiH
g) Ba(NO3)2+Na2SO4-> 2NaNo3+BaSO4
h) CuO+H2-> Cu+H20
I) Zn+2HCl-> ZnCl2+H2
J) 2FeCl2+Cl2-> 2FeCl3

Answer 1

b) Ca2+ + Co32- -> CaCo3
Combination reaction 
d) 2CCl4 + CrO42- -> 2CoCl2+ CrO2Cl2+2Cl- 
REDOX reaction
e) Ca+ F2-> CaF2
Combination reaction 
f) 2Li+H2-> 2LiH
Combination reaction 
g) Ba(NO3)2+Na2SO4-> 2NaNo3+BaSO4
Double replacement reaction
h) CuO+H2-> Cu+H20
Decomposition Reaction
I) Zn+2HCl-> ZnCl2+H2

J) 2FeCl2+Cl2-> 2FeCl3

Answer 2

Explanation :

(b) $Ca^{2+}+CO_3^{2-}\rightarrow CaCO_3$

This reaction is a combination reaction in which the two reactants molecule combine to form a large molecule or product.

(d) $2CCl_4+CrO_4^{2-}\rightarrow 2COCl_2+CrO_2Cl_2+2Cl^-$

This reaction is a redox reaction or oxidation-reduction reaction in which sulfur get oxidized and oxygen get reduced.

(e) $Ca+F_2\rightarrow CaF_2$

This reaction is a combination reaction in which the two reactants molecule combine to form a large molecule or product.

(f) $2Li+H_2\rightarrow 2LiH$

This reaction is a combination reaction in which the two reactants molecule combine to form a large molecule or product.

(g) $Ba(NO_3)_2+Na_2SO_4\rightarrow 2NaNO_3+BaSO_4$

This reaction is a double displacement reaction in which the cation of two reactants molecule exchange their places to give two different products.

(h) $CuO+H_2\rightarrow Cu+H_2O$

This reaction is a single displacement reaction in which the most reactive metal displaces the least reactive metal and forms different product.

(I) $Zn+2HCl\rightarrow ZnCl_2+H_2$

This reaction is a single displacement reaction in which the most reactive metal displaces the least reactive metal and forms different product.

(J) $2FeCl_2+Cl_2\rightarrow 2FeCl_3$

This reaction is a combination reaction in which the two reactants molecule combine to form a large molecule or product.