In which compound does Cr exhibit greater non metallic behavior, CrFe2 or CrF6? Explain?
In the compound CrFe2, the chromium (Cr) atom is bonded with iron (Fe) atoms, which are both transition metals. Transition metals, such as chromium and iron, are known for their metallic behavior. They typically have high electrical and thermal conductivity, malleability, and form positive ions.
On the other hand, in the compound CrF6, the chromium atom is bonded with fluorine (F) atoms, which are nonmetals. Nonmetals tend to have lower electrical and thermal conductivity, are often brittle, and form negative ions.
Since CrF6 contains chromium bonded with nonmetals, it exhibits greater nonmetallic behavior compared to CrFe2. Thus, the compound CrF6 would have more nonmetallic properties than CrFe2.
Which oxide, CrO3 or CrO, is more basic in water? Why
In water, the basicity of an oxide is determined by its ability to donate hydroxide ions (OH-) to the solution. Generally, oxides of metals tend to be basic, while oxides of nonmetals tend to be acidic.
In the case of CrO3 (chromium trioxide), it is an acidic oxide because it is composed of a nonmetal, oxygen, bonded with chromium, a transition metal. When CrO3 dissolves in water, it can react with water molecules to form an acid, resulting in the formation of hydronium ions (H3O+).
On the other hand, CrO (chromium(II) oxide) is a basic oxide because it is composed of a metal, chromium, bonded with oxygen. When CrO dissolves in water, it can react with water molecules to form hydroxide ions (OH-), resulting in the solution becoming basic.
Therefore, CrO (chromium(II) oxide) is more basic in water compared to CrO3 (chromium trioxide) since CrO can donate hydroxide ions, while CrO3 can donate hydronium ions, making it acidic.
To determine in which compound Cr (chromium) exhibits greater non-metallic behavior between CrFe2 and CrF6, we need to compare their oxidation states.
In CrFe2, chromium is in an oxidation state of +2, while in CrF6, chromium is in an oxidation state of +6.
Cr (chromium) tends to exhibit more metallic behavior with lower oxidation states, while higher oxidation states correspond to more non-metallic behavior.
Since CrF6 has a higher oxidation state of +6, it indicates that chromium is more electronegative and therefore exhibits more non-metallic behavior in this compound.
Hence, CrF6 exhibits greater non-metallic behavior compared to CrFe2.