A 20.00−mL sample of an unknown HClO 4 solution requires titration with 22.92mL of 0.2200M NaOH to reach the equivalence point.
What is the concentration of the unknown HClO 4 solution? The neutralization reaction is:
HClO 4 (aq)+NaOH(aq)�¨H 2 O(l)+NaClO 4 (aq)
mols NaOH = M x L = ?
mols HClO4 = mols NaOH (from the coefficients in the balanced equation)
M HClO4 = mols/L solution.
37
0.218
To find the concentration of the unknown HClO4 solution, we can use the equation:
M1V1 = M2V2
Where:
M1 = Concentration of NaOH solution (0.2200M)
V1 = Volume of NaOH solution used (22.92 mL)
M2 = Concentration of HClO4 solution (unknown)
V2 = Volume of HClO4 solution used (20.00 mL)
Rearranging the equation, we have:
M2 = (M1V1) / V2
Substituting the values we have:
M2 = (0.2200M * 22.92 mL) / 20.00 mL
M2 = 0.2527 M
Therefore, the concentration of the unknown HClO4 solution is 0.2527 M.