During an acid-base titration, the pH of an analyte solution containing HA(aq) is 6.33 and the ratio of [A–]/[HA] is 1.5. What is the Ka of HA? Assume the solution is in its buffering region (close enough to its half-equivalence point).

Why is the melting of ice a physical change ?

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Rank substituents in order of their priority when assigning the e or z label to an alkene. i, ch2i , h, ch2ch2cl, f