Question

 

Aqueous solution of borax reacts with two mole of acids.

This is because of:

Solution

Correct option is

Formation of 2 mol each of [B(OH)4] reacts with acid

When borax is dissolved in water, both B(OH)3 and [B(OH4)] are formed, but only [B(OH4)] reacts with HCl.   

Na2B4O7 + 7 H2⟶ 2Na[B(OH)4] + 2H3BO3 + 2H2O

 2Na[B(OH)4] + 2HCl âŸ¶ 2NaCl + 2H3BO3 + 2H2O

SIMILAR QUESTIONS

Q1

 

In the following reaction:

               

Q2

While testing , there is green-edged flame on heating the salt with conc. H2SO4 and CH3OH. Green colour is of:

Q3

The gaseous product(s) expected at room temperature by reaction of sodium boronhydride and boron tri-fluoride under anhydrous condition is (are): 

Q4

The oxide that gives H2O2 on treatment with a dilute acid is:

Q5

From B2H6, all the following can be prepared except:

Q6

Borax is converted into crystalline boron by the following steps: 

X and Y are respectively: