Describe the preparation of 2litre of 0.05molar silver from the primary standard grade solid.

You want how many mols Ag? That's M x L = 0.05 x 2L = 0.1.

mols = grams/molar mass; therefore, grams = mols x molar mass = 0.1 mol x 107.9 g/mol = ? grams Ag metal.