A mixture contains `NaCl` and unknown chloride `MCl`.
(a) `1 g` of this is dissolved in water, excess of acidified `AgNO_(3)` solution is added to it, so that `2.567 g` of white `ppt`. Is obtained.
(b) `1 g` of original mixture is heated to `300^(circ)C`. Some vapours come out which are absorbed in `AgNO_(3)` ( acidified) solution. `1.341 g` of white precipitate is obtained.
Find the mol.wt. of unkonwn chloride.
