Chapter 15.2, Problem 15.26QAP

Interpretation Introduction

(a)

Interpretation:

To balance the following equation in basic medium:

  ${\text{Al}}^{}\text{(s)}\text{+}{\text{ClO}}^{\text{-}}\text{(aq}\text{.)}\to {\text{AlO}}_{\text{2}}{}^{\text{-}}\text{(aq)}\text{+}{\text{Cl}}_{}^{\text{-}}\text{(aq}\text{.)}$

Concept Introduction:

In basic medium, the overall reaction contains only hydroxide ion other that given reactants and products.

Steps to be followed to balance a reaction in Basic medium:

• Break the reaction into different half-cell reactions.
• Balanced all the atoms other that H and O in both half-cell reaction separately.
• Balance the O-atom by adding water molecule to either side in the both half-cell reaction separately.
• Balance the H-atom by adding H+ ion separately in both the half- cell reaction.
• Balance the charge by adding electrons to either side in both half-cell reaction separately.
• Multiply both half-cell with an integer such that on adding up both reactions, electrons got cancel out and adjust H₂O molecules such that only one side contain H₂O molecule.
• Now add equal moles of OH- ions to both sides as we have H+ ions.
• Combine H+ and OH- ions which are on same side to form water molecule and then cancel out common amount of H₂O molecules from both sides.

Interpretation Introduction

(b)

Interpretation:

To balance the following equation in basic medium:

  ${\text{Sn}}^{\text{+2}}\text{(aq)}\text{+}{\text{IO}}_{\text{4}}{}^{\text{-}}\text{(aq}\text{.)}\to {\text{Sn}}^{\text{+4}}\text{(aq)}\text{+}{\text{I}}_{}^{\text{-}}\text{(aq}\text{.)}$

Concept Introduction:

In basic medium, the overall reaction contains only hydroxide ion other that given reactants and products.

Steps to be followed to balance a reaction in Basic medium:

• Break the reaction into different half-cell reactions.
• Balanced all the atoms other that H and O in both half-cell reaction separately.
• Balance the O-atom by adding water molecule to either side in the both half-cell reaction separately.
• Balance the H-atom by adding H+ ion separately in both the half- cell reaction.
• Balance the charge by adding electrons to either side in both half-cell reaction separately.
• Multiply both half-cell with an integer such that on adding up both reactions, electrons got cancel out and adjust H₂O molecules such that only one side contain H₂O molecule.
• Now add equal moles of OH- ions to both sides as we have H+ ions.
• Combine H+ and OH- ions which are on same side to form water molecule and then cancel out common amount of H₂O molecules from both sides.