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Saponification

Consider the ...

Question

Consider the given chemical reactions
$2 C H_{3} C O O H + N a_{2} C O_{3} \to 2 Y + C O_{2} + H_{2} O$
$W + N a H C O_{3} \to Y + C O_{2} + H_{2} O$
Compounds $^{'} Y^{'}$ and $^{'} W^{'}$ respectively are

A

C H_{3} C H_{2} O H

and

C H_{3} C O O N a

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B

C H_{3} C H O

and

C H_{3} C H_{2} O H

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C

C H_{3} C H_{2} O N a

and

C H_{3} C H O

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D

C H_{3} C O O N a

and

C H_{3} C O O H

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Solution

The correct option is D $C H_{3} C O O N a$ and $C H_{3} C O O H$
Ethanoic acid $(C H_{3} C O O H)$ reacts with sodium carbonate $(N a_{2} C O_{3})$ and sodium hydrogen carbonate $(N a H C O_{3})$ to give rise to sodium acetate $(C H_{3} C O O N a)$ , carbon dioxide $(C O_{2})$ and water $(H_{2} O)$ .

$2 C H_{3} C O O H + N a_{2} C O_{3} \to 2 C H_{3} C O O N a + C O_{2} + H_{2} O$
$^{'} W^{'}$ $^{'} Y^{'}$
$C H_{3} C O O H + N a H C O_{3} \to C H_{3} C O O N a + C O_{2} + H_{2} O$
$^{'} W^{'}$ $^{'} Y^{'}$

Hence, the correct answer is option (d).

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C O_{2}

gas along with solid (Y) is obtained when sodium salt (X) is heated. (X) is again obtained when

C O_{2}

gas is passed into aqueous solution of (Y). Identify (X) & (Y) respectively

Q. In the manufacture of sodium carbonate, the following reactions are involved:

(A) Δ - \to (B) + {CO}_{2}

(B) + H_{2} O \to (C) N H_{4} C l - --- \to (D)

(E) + {CO}_{2} \to (F)

(F) + NaCl \to G H e a t - -- \to {Na}_{2} {CO}_{3} + {CO}_{2} + H_{2} O

{(D) is a gas which is soluble in H}_{2} O

Compound (A) is:

Q. Consider two reactions
I.

Z n + c o n c . H N O_{3} (h o t) \to Z n (N O_{3})_{2} + X + H_{2} O

Z n + d i l . H N O_{3} (cold) \to Z n (N O_{3})_{2} + Y + H_{2} O

Compounds X and Y are respectively

Q. A sample contains a mixture of

N a H C O_{3}

N a_{2} C O_{3}

H C l

15.0

g of the sample yielding

11.0

N a C l

. What percent of the sample is

N a_{2} C O_{3}

?
Reactions are:

N a_{2} C O_{3} + 2 H C l \to 2 N a C l + C O_{2} + H_{2} O

N a H C O_{3} + H C l \to N a C l + C O_{2} + H_{2} O

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N a C l

N a H C O_{3}

N a_{2} C O_{3}

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84

106

g/mol respectively.

Consider the following reactions:

C a C O_{3} \to C a O + C O_{2}

E + C O_{2} \to F

N a C l + F \to A + N a H C O_{3}

E

F

are respectively :

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