The half‑equivalence point of a titration occurs half way to the equivalence point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.560 moles of a monoprotic weak acid ( K a = 3.0 × 10 − 5 ) is titrated with NaOH , what is the pH of the solution at the half‑equivalence point?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Which fact represents evidence for the big bang theory?