I bought few grams of sodium sulfide hydrate (Na2S.xH2O + aq.) with a molecular weight of 78.04 + aq. and assay as (Na2S) of 55-58% as source of sulfur to prepare CdS nanoparticles. I am trying to follow similar previous protocol I found in literature where the authors used 1.4 mmol of Na2S.9H2O...
