When aqueous solution of borax is acidified with hydrochloric acid, a white crystalline solid is formed which is soapy to touch. Is this solid acidic or basic in nature ? Explain.
When aqueous solution of borax is acidified with hydrochloric acid, a white crystalline solid is formed which is soapy to touch. Is this solid acidic or basic in nature ? Explain.
An aqueous solution of borax is acidified with $\mathrm{HCl}$ to give boric acid.
$\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}+2 \mathrm{HCl}+5 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{NaCl}+4 \mathrm{H}_{3} \mathrm{BO}_{3}$
Boric acid is a weak monobasic acid. It is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion :
$\mathrm{B}(\mathrm{OH})_{3}+2 \mathrm{HOH} \rightarrow\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{-}+\mathrm{H}_{3} \mathrm{O}^{+}$
Similar Questions
Explain what happens when boric acid is heated.
Explain what happens when boric acid is heated.
Discuss the pattern of variation in the oxidation states of
$(i)$ $B$ to $Tl$ and $(ii)$ $C$ to $Pb$.
Discuss the pattern of variation in the oxidation states of
$(i)$ $B$ to $Tl$ and $(ii)$ $C$ to $Pb$.
Consider the following reaction
$(a)\, B_2H_6 + 6H_2O \to$
$(b)\, B_2H_6 + 6CH_3OH \to$
$(c)\, B_2H_6 + 3Cl_2 \to$
$(d)\, BR_3 + 3CH_3COOH \to$
Identify incorrect statement about product $(s)$
Consider the following reaction
$(a)\, B_2H_6 + 6H_2O \to$
$(b)\, B_2H_6 + 6CH_3OH \to$
$(c)\, B_2H_6 + 3Cl_2 \to$
$(d)\, BR_3 + 3CH_3COOH \to$
Identify incorrect statement about product $(s)$
Given below are two statements :
Statement $I:$ Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement $II:$ The green colour observed is due to the formation of copper(I) metaborate.
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements :
Statement $I:$ Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement $II:$ The green colour observed is due to the formation of copper(I) metaborate.
In the light of the above statements, choose the most appropriate answer from the options given below :
- [JEE MAIN 2023]
Which of the following cation can not give borax bead test ?
Which of the following cation can not give borax bead test ?