In an aqueous solution, iron(III) ions react with iodide ions to give iron(II) ions and triiodide ions, I3-. Suppose the initial concentration of Fe3+ ions is 0.200 M, the initial I- ion concentration is 0.300 M, and the equilibrium concentration of I3- ions is 0.0866 M. What is the value of Kc? 2 Fe3+(aq) + 3 I-(aq) ⇄ 2 Fe2+(aq) + I3-(aq) Kc =

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false