Is calcium hydroxide an alkali or an insoluble base? The book says it's an alkali (soluble in water) but when NaOH reacts with Calcium Nitrate, we get insoluble ppt. of Calcium hydroxide (insoluble in water). What is correct?

Open in App

Solution

An alkali is a basic hydroxide or ionic salt of an alkali metal or alkaline earth metal element,which is soluble in water.
Only few alkalis are known, examples, sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)2).

Calcium hydroxide, Ca(OH)₂, is sparsely soluble in water. Limewater is the common name for a diluted solution of calcium hydroxide . Pure limewater is clear and colorless, with a slight earthy smell and an alkaline bitter taste of calcium hydroxide. When excess calcium hydroxide is added to limewater, a suspension of calcium hydroxide particles results, giving it a milky aspect.

if more calcium hydroxide are added or present , then it will be precipitated and present as insolube in water. this is the reason why in the above case .

so Like if satisfied

Suggest Corrections

Similar questions

Give one example in each case :

(a) A basic oxide which is soluble in water,

(b) A hydroxide which is highly soluble in water,

(d) A hydroxide which is insoluble in water,

(e) A weak mineral acid,

(f) A base which is not an alkali,

(g) An oxide which is a base,

(h) A hydrogen containing compound which is not an acid,

(i) A base which does not contain a metal ion.

Why iron hydroxide is insoluble in water and why all bases are not alkali why why why😣😣

M S O_{4}

M (O H)_{2}

Join BYJU'S Learning Program