Question

Look at the diagram and answer the following questions.

(A) What gas is prepared using this setup?

(B) Name the catalyst used in the reaction.

(C) Write the chemical reaction taking place.

Answer 1

(A)

The above experimental setup shows the laboratory preparation of $\mathrm{Oxygen}\left({\mathrm{O}}_2\right)$ gas from the compound $\mathrm{Hydrogen}\mathrm{peroxide}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)$.

(B)

In the laboratory preparation of $\mathrm{Oxygen}\left({\mathrm{O}}_2\right)$ gas from $\mathrm{Hydrogen}\mathrm{peroxide}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)$ , we use it $\mathrm{Manganese}\mathrm{dioxide}\left({\mathrm{MnO}}_2\right)$as the catalyst.

Catalyst: They are substances that increase the rate of a chemical reaction without undergoing any chemical change. Here the $\mathrm{Manganese}\mathrm{dioxide}\left({\mathrm{MnO}}_2\right)$act as a catalyst without undergoing any chemical change.

(C)

Decomposition reaction: In a decomposition reaction, a single substance decomposes to form two or more simpler substances. Here the compound $\mathrm{Hydrogen}\mathrm{peroxide}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)$ undergoes the decomposition reaction to form $\mathrm{Oxygen}\left({\mathrm{O}}_2\right)$ and water(${\mathrm{H}}_2\mathrm{O}$) in the presence of catalyst$\mathrm{Manganese}\mathrm{dioxide}\left({\mathrm{MnO}}_2\right)$.

Chemical equation

$\underset{\mathrm{Hydrogen}\mathrm{peroxide}}{2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{aq}\right)}\underset{\mathrm{Water}}{\stackrel{{\mathrm{MnO}}_2}{\to }2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}$

The laboratory preparation of $\mathrm{Oxygen}\left({\mathrm{O}}_2\right)$ gas from $\mathrm{Hydrogen}\mathrm{peroxide}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)$