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3 years ago

Why distilled water used for the preparation of lassaigne's extract?

Chemistry

1 answer:

Ber [7]3 years ago

7 0

Answer:

This is because tap water contains chloride ions which will give a precipitate of AgCl with AgNO3 solution even if the organic compound does not contain chlorine.

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3 years ago

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Calcium carbonate decomposes to form calcium oxide and carbon dioxide, like this:

Leni [432]

Answer: The value of the equilibrium constant Kc for this reaction is 0.088

Explanation:

$Molarity=\frac{x}{M\times V_s}$

where,

x = given mass

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$V_s$ = volume of solution in L

Equilibrium concentration of $CaCO_3$ = $\frac{25.3}{100\times 9.0}=0.028M$

Equilibrium concentration of $CaO$ = $\frac{14.9}{56\times 9.0}=0.029M$

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The given balanced equilibrium reaction is,

$CaCO_3(s)\rightleftharpoons CaO(s)+CO_2(g)$

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[CaO]\times [CO_2]}{[CaCO_3]}$

Now put all the given values in this expression, we get :

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3 years ago

Convert 73.7L to KL *

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3 years ago

Why distilled water used for the preparation of lassaigne's extract? ​

Why distilled water used for the preparation of lassaigne's extract?