What is the approximate ph at the equivalence point of a weak acid-strong base titration if 25 ml of aqueous hydrofluoric acid requires 30. 00 ml of 0. 400 m naoh? ka = 6. 76 × 10-4 for hf.

i believe the answer is a.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l