Question

Complete and balance the following chemical equations: 

Hint:

- KMnO$_4$ decomposition is a key reaction in the production of oxygen in labs. - Dichromate-Iodide reaction is a classic redox reaction where Cr$^{6+}$ is reduced, and I$^-$ is oxidized to I$_2$. - Always balance chemical equations by ensuring both mass and charge conservation.

Answer 1

Complete and Balanced Chemical Equations 
(1) Thermal Decomposition of Potassium Permanganate: \[ 2KMnO_4 \xrightarrow{\text{heat}} K_2MnO_4 + MnO_2 + O_2 \] (2) Dichromate-Iodide Reaction: \[ Cr_2O_7^{2-} + 6I^- + 14H^+ \rightarrow 2Cr^{3+} + 3I_2 + 7H_2O \]