How does the oxidation state of na change in the following reaction?
li(s) + naoh(aq) → lioh(aq) + na(s)

The oxidation number increases from 0 to +1.

Explanation:

The important rules for oxidation numbers are:

Thus, in your reaction, the oxidation numbers are:

The oxidation number of Li increases from 0 to +1.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the answer is na (sodium)