Question

I2 + Na2S2O3 → NaI + Na2S4O6 Balance the equation, if necessary.

Answer 1

Answer : The balanced chemical reaction will be,

$I_2+2Na_2S_2O_3\rightarrow 2NaI+Na_2S_4O_6$

Explanation :

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

The given unbalanced chemical reaction is,

$I_2+Na_2S_2O_3\rightarrow NaI+Na_2S_4O_6$

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of iodine, sulfur and oxygen are not balanced.

In order to balanced the chemical reaction, the coefficient 2 is put before the $NaI$ and $Na_2S_2O_3$.

Thus, the balanced chemical reaction will be,

$I_2+2Na_2S_2O_3\rightarrow 2NaI+Na_2S_4O_6$

Answer 2

I2 + 2 Na2S2O3 = 2 NaI + Na2S4O6

Reaction type double replacement