Question

$Cl{O}^{-}\rightleftarrows {ClO}_3^{-}+{Cl}^{-}$
When the equation for the reaction represented above is balanced with coefficients reduced to the lowest whole-umber terms, correct statements include which of the following?
I. The coefficient for ${Cl}^{-}$ is 4.
II. The coefficient for ${ClO}_3^{-}$ is 2.
III. The coefficient for $Cl{O}^{-}$ is 3.

• A. I only
• B. II only
• C. III only
• D. I and II only
• E. I, II and III only

Answer 1

The correct option is C III only

Balanced equation can be written as:

$2C{l}^{-}+4H^{+}+2Cl{O}_3^{-}\to 2Cl{O}_2+2H_{2}O+C{l}_2$