What is difference between Fe2+ and Fe3+?

The difference between Fe2+ and Fe3+ is the Fe2+ has a pale green colour and turns violet when water is added to it. While Fe3+ forms blood-red when it reacts with thiocyanate ions. Fe2+ has paramagnetic properties whereas Fe3+ has diamagnetic properties.

Is Fe2+ less than Fe3+?

Reduction reaction: The oxidation number of Fe2+ increases when it is oxidised to Fe3+.

Why is Fe3 more reactive than Fe2?

Which is more reactive, Fe2+ or Fe3+, and why? Fe3+ has more chemical potential than Fe2+, and it reacted faster and to a greater extent with Zn. The emf for the half reaction Fe3+ + 3e – Fe is greater than the emf for the half reaction Fe2+ + 2e – Fe. Therefore, Fe3+ is a stronger oxidizing agent than Fe2+.

Why is Fe3+ more stable than Fe2+?

Fe3+ is more stable than Fe2+. This is explained with the help of the electronic configuration. In Fe3+ ions, there are five 3d half-filled orbitals and is more symmetrical than Fe2+. Whereas in Fe2+ ion there are four 3d half-filled orbitals and one orbital is filled.

What element has the biggest size?

francium
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Is Fe2+ bigger than Fe3+?

Fe2+ is greater in size than Fe3+. Consider the electronic configuration of Fe2+[Ar] 3d6 and Fe3+[Ar] 3d5 (For comparison, Fe [Ar] 4s2 3d6). Fe3+ ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm. (For comparison, the Fe atom has a radius of 140 pm).

Why is Fe2 easily oxidized to Fe 3?

Fe2+ is easy to oxidize to Fe3+ because removing the electron results in a half filled d subshell. Fe2+ is easy to oxidize to Fe3+ because ions with an odd charge are most stable for atoms with an even atomic number.

Is Fe2 more soluble than Fe3?

This oxidized Fe forms inert iron oxides and hydroxides and is thus essentially not available to photosynthesizing organisms. On the other hand, Fe2+, the reduced form of iron, is more soluble and thus more biological reactive – but rapid oxidation to Fe3+ would seemingly make existence of Fe2+ nearly impossible.

Fe3+ more stable than Fe2+ because Fe3+ have less number of electron, reduces the shielding effect increases the relative nuclear charge exerted by the nucleus on the electron. This pushes the electron inwards and reduces the size of atom which further results in decrease in energy and hence increases the stability of the ion.

What is the ionic radius of Fe3+ [Ar] 3d5?

Consider the electronic configuration of Fe2+ [Ar] 3d6 and Fe3+ [Ar] 3d5 (For comparison, Fe [Ar] 4s2 3d6). Fe3+ ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm. (For comparison, the Fe atom has a radius of 140 pm). This is because the outermost electron in the Fe2+ ion is pulled off to form Fe3+ ion.

Why is I- a good reducing agent and FeI3 is not?

I- is much larger in size, so has higher tendency to lose electron, and hence is a good reducing agent. I- reduces Fe3+ to Fe2+ and itself gets oxidised to I2, hence FeI3 is unstable. So, it being an oxidising agent oxidises Fe2+ to Fe3+, which favours formation of FeCl3 and makes it stable.

How many protons and electrons does Fe+3 have?

Fe atomic number is 26 which means it has 26-electrons and 26-protons. When Fe loses three electrons then three protons become excess in Fe which appear as Fe+3. Now after losing three electrons, Fe has 23-electrons and 26-protons and these 23-electrons are being neutralized by 23-protons out of 26-protons.