Question

for a strong acid - strong base titration, what is the ph at the equivalence point? 1 5 7 9

Explanation:

In a strong acid - strong base titration, the reaction is \(H^+ + OH^-=H_2O\). At the equivalence point, the moles of \(H^+\) from the strong acid equal the moles of \(OH^-\) from the strong base. The resulting solution contains only the salt of the strong acid and strong base (e.g., \(NaCl\) from \(HCl\) and \(NaOH\) titration). Salts of strong acids and strong bases do not hydrolyze in water. So, the concentration of \(H^+\) ions is \(1\times10^{-7}\space mol/L\) (at \(25^{\circ}C\)), and \(pH =-\log[H^+]=7\).

Answer:

7