Write a balanced half-reaction for the reduction of solid manganese dioxide to manganese ion in acidic aqueous solution. be sure to add physical state symbols where appropriate.

Explanation:

Reduction is a process where electrons are gained and acidic solution means presence of ions.

Reduction of to

Mn is in +4 oxidation state in which goes to +2 state in by gain of 2 electrons.

In order to balance oxygen atoms:

In order to balance hydrogen atoms:

In order to balance charges:

Thus the net balanced half reaction for the reduction of solid manganese dioxide to manganese ion in acidic aqueous solution is:

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molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.