لو سمحتوا في أحد يقدر يشرح لي طريقة الحل لهذين السؤالين ضروري و بسرعة ؟؟؟
25mL of a 0.2450M NH4Cl solution is added to 55.5 mL of 0.1655M FeCl3 . what is the concentration of chloride ion the final solution ?
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what mass of K2CO3 is needed to prepare 200mL of a solution having a potassium ion concentration of 0.150 M ????