I already did but i didnt find the reaction with NH4Cl
the fact is, we prepared the copper tetraammine sulfate mohohydrate, then we were supposed to determine its concentration by spectro, drawing a calibration curve. so the solutions we used to draw the calibration curve was a solution prepared from CuSO4.5H2O with NH4Cl and NH4OH
what did we prepare the mother solution like this?