Answer Happy

A 0.456 gram sample of an unknown mono- protic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH. What is the molecular weight of the unknown acid HZ? 1. 85.7 g/mol 2.0.00259 g/mol 3. 103.2 g/mol 4. 187.9 g/mol 5. 80.6 g/mol
t 023 10.0 points Benzoic acid reacts with water to form the benzoate ion by the following reaction C6H5COOH(aq) + H₂O(1) C6H5COO(aq) + H3O+ (aq) The equilibrium constant for this reaction is 6.4 x 10-5. In a 0.1 M solution of benzoic acid, what is the concentration of the benzoate ion at equilibrium? X 1.0.1 M 2. 6.4 x 10-5 M 3. 8.0 x 10-3 M 4. 2.5 x 10-3 M 5. 0.0975 M