A certain buffer contains equal concentrations of X^- and HX.The K_b^Θof X^- is 10^-10，the pH of the buffer is（）

If KbΘ for NH3 is 2×10-5，KaΘ for the NH4+ ion is（）A.2×1...

单项选择题If K_b^Θ for NH₃ is 2×10^-5，K_a^Θ for the NH₄⁺ ion is（）

When 500mL of 0.10mol·L-1 NaOH is reacted with 500ml of...

单项选择题When 500mL of 0.10mol·L^-1 NaOH is reacted with 500ml of 0.20mol·L^-1 HCl the final concentration of H⁺ is（）

A certain weak acid is 10% dissociated in 1.0mol·L-1 so...

单项选择题A certain weak acid is 10% dissociated in 1.0mol·L^-1 solution.In 0.10mol·L^-1 solution，the percentage of dissociation would be（）。