In the estimation of $C$ and $H$ by Liebig's method,is $H_2O$ absorbed before $CO_2$? Why?
(A) Yes,in the quantitative analysis of $C$ and $H$,the combustion products are passed through a series of $U$-tubes.
First,the gases are passed through a $U$-tube containing anhydrous $CaCl_2$,which absorbs $H_2O$ vapor.
Then,the remaining gases are passed through a $U$-tube containing $KOH$ solution,which absorbs $CO_2$.
This specific order is necessary because $KOH$ would absorb both $H_2O$ and $CO_2$,making it impossible to determine their individual masses accurately.
First,the gases are passed through a $U$-tube containing anhydrous $CaCl_2$,which absorbs $H_2O$ vapor.
Then,the remaining gases are passed through a $U$-tube containing $KOH$ solution,which absorbs $CO_2$.
This specific order is necessary because $KOH$ would absorb both $H_2O$ and $CO_2$,making it impossible to determine their individual masses accurately.
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View SolutionConsider the following reaction. On estimation of bromine in $1.00 \ g$ of $R$ using Carius method,the amount of $AgBr$ formed (in $g$) is . . . .
$\overline{[Given :}$ Atomic mass of $H = 1, C = 12, O = 16, P = 31, Br = 80, Ag = 108]$
$\overline{[Given :}$ Atomic mass of $H = 1, C = 12, O = 16, P = 31, Br = 80, Ag = 108]$
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View Solution$6.46 \ g$ of $BaSO_4$ is obtained from $4.81 \ g$ of a compound in the estimation of sulphur by the Carius method. Calculate the percentage of sulphur in the compound. (Atomic masses: $Ba = 137, S = 32, O = 16$)
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View SolutionIn Carius method for estimation of halogens,$0.2 \, g$ of an organic compound gave $0.188 \, g$ of $AgBr$. The percentage of bromine in the compound is $......$ . (Nearest integer)
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[Atomic mass: $Ag=108, Br=80$ ]
Match column $-I$ and column $-II$ with the correct relation:
Column $-I$ Column $-II$ $(i)$ Dumas method $(a)$ Absorption of $NH_3$ in $H_2SO_4$ $(ii)$ Kjeldahl's method $(b)$ $BaCl_2$ by added $BaSO_4$ $(iii)$ Carius method $(c)$ Mixture of Magnesia $(iv)$ Estimation of phosphorus $(d)$ $N_2$
| Column $-I$ | Column $-II$ |
|---|---|
| $(i)$ Dumas method | $(a)$ Absorption of $NH_3$ in $H_2SO_4$ |
| $(ii)$ Kjeldahl's method | $(b)$ $BaCl_2$ by added $BaSO_4$ |
| $(iii)$ Carius method | $(c)$ Mixture of Magnesia |
| $(iv)$ Estimation of phosphorus | $(d)$ $N_2$ |
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