Question

Predict the missing component of each reaction.
2KCIO3 - 2KCI + ?
MgO + ? - Mg(OH)2

Answer 1

1. 3O2
This will be 2KClO3=2KCl+3O2
2. H2O
This will be MgO+H2O= Mg(OH)2

Answer 2

(a) The missing component is
`3O_2`

(b) The missing component is
`H_2O`

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

(a) The given unbalanced chemical reaction is,

`2KClO_3\rightarrow 2KCl+?`

This reaction is an unbalanced chemical reaction because in this reaction one product is missing.

The given reaction is decomposition reaction which the larger molecule decomposes to give two or more smaller products.

The balanced chemical reaction will be,

`2KClO_3\rightarrow 2KCl+3O_2`

In this reaction, the missing component is
`3O_2`

(b) The given unbalanced chemical reaction is,

`MgO+?\rightarrow Mg(OH)_2`

This reaction is an unbalanced chemical reaction because in this reaction one product is missing.

The given reaction is synthesis reaction which the two smaller molecules react to give single product.

The balanced chemical reaction will be,

`MgO+H_2O\rightarrow Mg(OH)_2`

In this reaction, the missing component is
`H_2O`