1. mass of potassium nitrate KNO 3 should be added to 255 g of water to prepare a 15% (m/m) solution of KNO 3 ? [Molar mass KNO 3 =

1. mass of potassium nitrate KNO 3 should be added to 255 g of water to prepare a 15% (m/m) solution of KNO 3 ? [Molar mass KNO 3 = 101.1 g/mole] 2. Determine the mass of sodium chloride (NaCl) required to prepare a 300 ml Mueller-nton broth solution supplemented with 5.5% (wt/vol) sodium chloride solution. [Mwt NaCl = 58.44 g/mol] 3. You have dissolved 45 g of magnesium sulphate in 300 ml distilled water (dH 2 O). is the concentration of this MgSO 4 solution expressed as % (m/v)? [Mwt MgSO 4 = 120.37 g/mol]