Please calculate the theoretical mass of the salt needed to prepare 25mL solution of 0.1M concentration.
Possible salts are KCl, KBr, KI, NaCl, NaBr, NaI. You must calculate the mass of each possible salt.
Molarity = Moles / V in L
0.1 = Moles *1000 / 25
Moles = 0.0025
Mass of KCl = Moles *Molar mass = 0.0025*74.55 = 0.186375 gms
Mass of KBr = Moles *Molar mass = 0.0025*119 = 0.2975 gms
Mass of KI = Moles *Molar mass = 0.0025**166 = 0.415 gms
Mass of NaCl = Moles *Molar mass = 0.0025*58.44 = 0.146 gms
Mass of NaBr = Moles *Molar mass = 0.0025*102.894 = 0.257 gms
Mass of NaI = Moles *Molar mass = 0.0025*150 = 0.375 gms
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