Respuesta :
Explanation:
It is known that at the equivalence point,
Equivalent of acid = equivalent of base ......... (A)
and, Equivalent = [tex]\text{Molarity} \times n_{f} \times V[/tex]
Therefore, equivalent of acid is calculated as follows.
Equivalent of acid = [tex]M \times 1 \times 4[/tex] .......... (1)
Equivalent of base = [tex]0.05 \times 1 \times 12.8[/tex] ............ (2)
Hence, using equation (A) we will calculate the concentration as follows.
[tex]M \times 4 = 0.05 \times 12.8[/tex]
M = 0.16 M
Thus, we can conclude that concentration of the unknown weak acid solution 0.16 M.
