Advertisements
Advertisements
Question
Explain what happens when boric acid is heated.
Advertisements
Solution
On heating orthoboric acid (H3BO3) at 370 K or above, it changes to metaboric acid (HBO2). On further heating, this yields boric oxide B2O3.
\[\ce{H3BO3 ->[\Delta][370 K] \underset{Metaboric acid}{HBO2} ->[\Delta][red hot] \underset{\text{Boric oxide}}{B2O3}}\]
RELATED QUESTIONS
Is boric acid a protic acid? Explain.
Explain the Structure of Boric Acid.
Explain the following reaction.
Hydrated alumina is treated with aqueous NaOH solution.
A certain salt X, gives the following results.
- Its aqueous solution is alkaline to litmus.
- It swells up to a glassy material Y on strong heating.
- When conc. H2SO4 is added to a hot solution of X, white crystal of an acid Z separates out.
Write equations for all the above reactions and identify X, Y and Z.
Write a balanced equation for B2H6 + H2O → ?
Write a balanced equation for \[\ce{H3BO3 ->[\Delta]}\]?
Explain the Structure of Diborane.
Draw the structures of BCl3.NH3 and AlCl3 (dimer).
Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridisation of boron in this species?
What are boranes? Give chemical equation for the preparation of diborane.
A compound (A) of boron reacts with NMe3 to give an adduct (B) which on hydrolysis gives a compound (C) and hydrogen gas. Compound (C) is an acid. Identify the compounds A, B and C. Give the reactions involved.
Which of the following is a FALSE statement about boric acid, \[\ce{H3BO3}\]?
Diborane (B2H6) reacts independently with O2 and H2O to produce, respectively:
In diborane ______.
When aqueous solution of AICl3 is concentrated, it furnishes crystals of ______.
Which one of the following methods is used to prepare borax crystals?
Boric acid (H3BO3) is ______.
The reaction of H3N3B3Cl3(A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H3N3B3(Me)3. Compounds (B) and (C) respectively, are ______.
