In: Chemistry
Which of the following titrations results in a basic solution at the equivalence point? Select one:
A. NaCN titrated with HCl
B. HCl titrated with NH3
C. HCN titrated with NaOH
D. HCl titrated with NaOH
A. NaCN titrated with HCl
NaCN + HCl --------> NaCl + HCN
Formation of neutral salt NaCl and weak acid HCN = so acidic medium
B. HCl titrated with NH3
HCl + NH3 --------> NH4Cl
Formation of salt of strong acid and weak base = acidic medium
C. HCN titrated with NaOH
HCN + NaOH -------> NaCN + H2O
Formation of salt of strong base NaOH and weak acid HCN = basic medium
D. HCl titrated with NaOH
HCl + NaOH -------> NaCl + H2O
Formation of neutral salt NaCl and water = neutral medium
Correct option (C)