(C) In the reaction $Al(OH)_3 + 2H_3PO_3 \to Al(OH)(H_2PO_3)_2 + 2H_2O$:For $Al(OH)_3$: Two $OH^-$ groups are replaced by $H_2PO_3^-$ groups. Thus,the

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(C) In the reaction $Al(OH)_3 + 2H_3PO_3 \to Al(OH)(H_2PO_3)_2 + 2H_2O$:For $Al(OH)_3$: Two $OH^-$ groups are replaced by $H_2PO_3^-$ groups. Thus,the acidity (n-factor) is $2$.Equivalent weight $E_{Al(OH)_3} = \frac{M_1}{2}$.For $H_3PO_3$: Each $H_3PO_3$ molecule loses one $H^+$ ion to form $H_2PO_3^-$. Thus,the basicity (n-factor) is $1$.Equivalent weight $E_{H_3PO_3} = \frac{M_2}{1}$.

Class 11 Chemistry Some Basic Concepts of Chemistry Atomic, Molecular and Equivalent masses

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If $M_1$ and $M_2$ are the molecular weights of $Al(OH)_3$ and $H_3PO_3$ respectively,find their equivalent weights in the following reaction:
$Al(OH)_3 + 2H_3PO_3 \to Al(OH)(H_2PO_3)_2 + 2H_2O$

A
$\frac{M_1}{3}, \frac{M_2}{3}$
B
$\frac{M_1}{3}, \frac{M_2}{2}$
C
$\frac{M_1}{2}, \frac{M_2}{1}$
D
$\frac{M_1}{2}, \frac{M_2}{2}$

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Some Basic Concepts of Chemistry

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Atomic, Molecular and Equivalent masses

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Write formulas for the following compounds:
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What is the equivalent weight of methanol if one mole of $CH_3OH$ is combusted to form $CO$ and $H_2O$?

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An element,$X$ has the following isotopic composition:
$^{200}X: 90\%$,$^{199}X: 8.0\%$,$^{202}X: 2.0\%$
The weighted average atomic mass of the naturally occurring element $X$ is closest to......$amu$.

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If $M_1$ and $M_2$ are the molecular weights of $Al(OH)_3$ and $H_3PO_3$ respectively,find their equivalent weights in the following reaction:$Al(OH)_3 + 2H_3PO_3 \to Al(OH)(H_2PO_3)_2 + 2H_2O$

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One gram of hydrogen is found to combine with $80 \ g$ of bromine. One gram of calcium (valency $= 2$) combines with $4 \ g$ of bromine. The equivalent weight of calcium is:

Write formulas for the following compounds:$(1)$ Iron $(III)$ sulphate$(2)$ Chromium $(III)$ oxide

Naturally occurring boron has $20\%$ $_5B^{10}$ and $80\%$ $_5B^{11}$. The average atomic weight of boron is

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An element,$X$ has the following isotopic composition:$^{200}X: 90\%$,$^{199}X: 8.0\%$,$^{202}X: 2.0\%$The weighted average atomic mass of the naturally occurring element $X$ is closest to......$amu$.

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If $M_1$ and $M_2$ are the molecular weights of $Al(OH)_3$ and $H_3PO_3$ respectively,find their equivalent weights in the following reaction:
$Al(OH)_3 + 2H_3PO_3 \to Al(OH)(H_2PO_3)_2 + 2H_2O$

Write formulas for the following compounds:
$(1)$ Iron $(III)$ sulphate
$(2)$ Chromium $(III)$ oxide

An element,$X$ has the following isotopic composition:
$^{200}X: 90\%$,$^{199}X: 8.0\%$,$^{202}X: 2.0\%$
The weighted average atomic mass of the naturally occurring element $X$ is closest to......$amu$.