100 g of C6H12O6, (aq.) solution has vapour pressure is equal to 40 torr at certain temperature. Vapour pressre d H20(l) is 40.8 torr at same temperature if this solution is cooled to -0.93°C, what mass of ice wil be seperated out ? ( Kf :1.86 kg mol-1)

Molality of an aqueous solution of glucose (Molar mass :180 gmol-1) is 1.0 m. 590 g of this solution is cooled and the temperature is kept at -30°C. The amount of ice separated out (Kf for water 2 K kgmol-1) is...

The van't Hoff's factor for 0.1 M Ba(NO3)2 solution is 2.74. the degree of dissociation is.

Aqueous solution of 0.004 M Na2SO4 and 0.01 M glucose are iosotonic .The degree of dissociation of Na2SO4 is ..

Why aqueous solution of borax reacts with two moles of acids ?

Aqueous solution of borax reacts with two moles of acids this is because of formation of 2mol each of Na[B(OH)4]¯and B(OH)₃of which only Na[B(OH)₄]¯ reacts with acid. The chemical reaction given as below:

 Na₂B₄O₇ + 7H₂O ⟶ 2B(OH)₃ + 2Na[B(OH)₄]

B(OH)₃ or H₃BO₃ is an acid and does not react with acid. Hence Na[B(OH)₄] reacts with acid.

 

Related Questions:

Why Ga has small size than Al exceptionally

Why aqueous solution of borax reacts with two moles of acids ?

What is structure of solid Ortho Boric acid ?

What is the structure of trimetaboric acid and trimetaborate ion?  

Why Borazine is more reactive than benzene towards Electrophic Aromatic substitution reactions ?

Why Borazine (B3N3H6) is also known as inorganic benzene ?.

Why B-F bond length in BF3 is shorter (130 pm) than B-F bond Iength in BF4- (143 pm)?. Explain.

Why B-F do not exist as dimer?. Explain.

Although anhydrous aluminium chloride is covalent but its aqueous solution is ionic in nature. Why?

Why Boric acid become strong acid in the presence of cis 1,2-diol or 1,3-diol ?