Question

Ferric hydroxide is not an alkali although it is a mettalic hydroxide. Give reasons,​

Answer 1

Answer:

sodium hydroxide, potassium hydroxide, calcium hydroxide are soluble in water. ... But bases like copper hydroxide Cu(OH)2 ferric hydroxide (Fe(OH)3) aluminium hydroxide (Al(OH)3)do not dissolve in water. They are, therefore, not alkalis. Hence, all alkalis are bases, but all bases are not alkalis.

Answer 2

Final answer:

Ferric hydroxide ($Fe(OH)_{3}$), is insoluble in water. Therefore it is not an alkali.

Given that: We are given a statement, ferric hydroxide is not an alkali although it is a metallic hydroxide.

To find: We have to find the reasons.

Explanation:

• A base is a hydroxyl compound that has a $OH^{-}$ group, which releases $OH^{-}$ ions in an aqueous solution.

• So, by definition, the alkalis are bases, which can be dissolved in water and yield a $p^{H}$ higher than 7.

• If the base is insoluble in water then it is considered a base, not an alkali.
• In that way, we can say that all bases are not alkalis but all alkalis are bases.

• Some examples of bases are $Zn(OH)_{2}$ (zinc hydroxide), $Cu(OH)_{2}$ (copper hydroxide), etc., they are not alkalis,

Here we are given the hydroxide of iron, that is ferric hydroxide.

• The molecular formula of ferric hydroxide is $Fe(OH)_{3}$.

• $Fe(OH)_{3}$ is metallic hydroxide.

• The solubility product ($K_{sp}$) of ferric hydroxide is very small, which means it is not soluble in water. So, it is not considered an alkali.

Hence, $Fe(OH)_{3}$ is a metallic hydroxide, not an alkali.

To know more about the concept please go through the links

https://brainly.in/question/190560

https://brainly.in/question/614764

#SPJ3