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Borax

What is the v...

Question

What is the value of X in the given chemical formula of crystalline borax, $N a_{2} [B_{4} O_{5} (O H)_{4}] . X H_{2} O$ ?

A

5

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B

6

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C

7

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D

8

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Solution

The correct option is D 8
Borax is white crystalline solid of formula $N a_{2} B_{4} O_{7} .10 H_{2} O$ which can also be written as $N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O$ .

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Similar questions

Q. Borax is correctly represented as

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O

. Number of tetrahedral boron atoms present are

x

B - O - B

y

\frac{y}{x}

Q. Borax is actually made of two tetrahera and two triangular units joined together and should be written as:

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O

Consider the following statements about borax.

Q. What is the chemical formula of borax?

Q. Borax is actually made of two tetrahedral and two triangular units joined together and should be written as:

N a_{2} [B_{4} O_{5} (O H)_{4}] \cdot 8 H_{2}

O
Consider the following statements about borax. Which of the following is the correct statement?

Q. The following sequence of reactions are used to convert Borax into Boron.

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O X - \to H_{3} B O_{3} △ - \to B_{2} O_{3} Y \to B B o r o n

Reagents X and Y are respectively:

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