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One millimole of Ni(NO3)2 dissolves in 210mL of a solution that is .500M in NH3. (a) What...

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Chemistry

One millimole of Ni(NO3)2 dissolves in 210mL of a solution thatis .500M in NH3.

(a) What is the initial concentration of Ni(NO3)2 in thesolution?

------> The answer to (a) is .00476 M. I just can't figureout part (b)

(b) What is the equilibrium concentration of Ni^2+(aq) in thesolution?

HINT: The Ni^2+ forms a hexammonia complex: Ni(NH3)6^2+. Kf =5.5 x 10^8.

Answer & Explanation Solved by verified expert
4.3 Ratings (788 Votes)
Givenmillimoles of NiNO32 1Volume of solution 210 mL x 1L 1000 mL 0210LConcentration of NH3 solution 0500MKf of NiNH362 55 x 108a calculating the initial concentration ofNiNO32 in the solution 1 millimole NiNO32 x 1 mole    See Answer
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