1 g of silver salt of a dibasic organic acid gave 0.71 g of silver on ignition. Molecular mass of th

Question

1 g of silver salt of a dibasic organic acid gave 0.71 g of silver on ignition. Molecular mass of the acid is\

Professor PC Thomas Classes · Answer

$\mathrm{RCOOH} ightarrow \underset{\mathrm{w}_{1}}{\mathrm{RCOO} \mathrm{Ag}} ightarrow \underset{\mathrm{w}_{2}}{\mathrm{Ag}}$ Equivalent mass of silver salt $=\frac{\mathrm{w}_{1}}{\mathrm{w}_{2}} 	imes 108$\ Equivalent mass of acid $=\left[\frac{\mathrm{w}_{1} 	imes 108}{\mathrm{w}_{2}}-107ight]$\ $\mathrm{E}=\left(\frac{1.0 	imes 108}{0.71}-107ight]=45$\ Molecular mass of acid $=\mathrm{E} 	imes 2$ $$ =45 	imes 2=90 $$