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Basicity of Acids

An acid with ...

Question

An acid with molecular formula $C_{7} H_{6} O_{3}$ forms three types of sodium salts, which are: $C_{7} H_{6} O_{3} N a, C_{7} H_{6} O_{3} {N a}_{2}$ and $C_{7} H_{6} O_{3} {N a}_{3}$ .
The basicity of this acid is:

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Solution

Basicity of acid is defined as the no of ionizable hydrogen ions present in one molecule of an acid.
Here, molecule shows three replaceable $H -$ atoms. So its basicity is 3.

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(C_{9} H_{8} O_{4})

is prepared by reacting salicylic acid

(C_{7} H_{6} O_{3})

and acetic anhydride

(C_{4} H_{6} O_{3})

C_{7} H_{6} O_{3} + C_{4} H_{6} O_{3} \to C_{9} H_{8} O_{4} + C_{2} H_{4} O_{2}

How many moles of salicylic acid should be used to prepare six 5-grain aspirin tablets? (1 g = 15.5 grains)

Q. How many of the following can dissolve in aqueous

H C l

N a O H

solution to liberate

H_{2}

?

B, A l, B_{2} H_{6}, B_{2} O_{3}, N a A l H_{4}, {A l}_{2} O_{3}, A l {C l}_{3}, {B F}_{3}

Q. Molecular formula

C_{3} H_{6} {B r}_{2}

Q. (a) Compound

(A)

with molecular formula

C_{2} H_{4} O

reduces Tollen's reagent.

(A)

on treatment with

H C N

(B)

(B)

on hydrolysis with an acid gives compound

(C)

with molecular formula

C_{3} H_{6} O_{3}

which is an optically active compound. Compound

(A)

on reduction with

N_{2} H_{4} / C_{2} H_{5} O N a

gives a hydrocarbon

(D)

of molecular formula

C_{2} H_{6}

(A), (B), (C)

(D)

and explain the reactions.
(b) Ionic conductance at infinite dilution of

{A l}^{3 +}

{S O}_{4}^{2 -}

189 {o h m}^{- 1} {c m}^{2} g m

{e q u i v}^{- 1}

160 {o h m}^{- 1} {c m}^{2} g m

{e q u i v}^{- 1}

. Calculate equivalent and molar conductance of the electrolyte at infinite dilution.

Q. An acid with molecular formula

C_{7} H_{6} O_{3}

forms three types of sodium salts.
i.e.,

C_{7} H_{5} O_{3} N a, C_{7} H_{4} O_{3} N a

C_{7} H_{3} O_{3} N a_{3}

. The basicity of the acid is:

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