Chemistry - Stoichiometry Question with Solution | TestHub
76 gram of a silver salt of dibasic acid on heating left a residue of 54 gram silver. Silver salt contains only and in mole ratio of then find the mass of gas liberated during ignition of 76 gm silver salt ( )
Options:
Answer:
Solution:
The silver salt of a dibasic acid is .
Given C:O mole ratio is 1:2, so the anion contains units.
Since it's a dibasic acid, the anion could be .
The simplest dibasic acid with C:O = 1:2 is oxalic acid, , so the salt is .
Molar mass of Ag = 108 g/mol.
Mass of Ag residue = 54 g.
Moles of Ag = mol.
Since the salt is dibasic, it contains 2 Ag atoms per molecule.
Moles of silver salt = mol.
The total mass of the silver salt is 76 g.
Molar mass of salt = g/mol.
For :
Molar mass = g/mol.
This confirms the salt is .
Upon heating, silver oxalate decomposes:
From the stoichiometry, 1 mole of produces 2 moles of .
Moles of liberated = mol.
Molar mass of g/mol.
Mass of liberated = g.
The final answer is .