The overall formation constant for Cu(NH3)42+ is 1.1x1013 at 25oC. What is [Cu2+

Question

The overall formation constant for Cu(NH3)42+ is 1.1x1013 at 25oC. What is [Cu2+], in moles per litre, at equilibrium when 7.9 g Cu(NO3)2 is dissolved in 0.500 L of 1.00 mol/L NH3(aq)? Assume that there is no volume change when the Cu(NO3)2 is added to the solution.

Give your answer accurate to two signficant figures. Enter 1.23x10-10 as 1.23e-10. Give your answer in mol/L but do not include units as part of your answer.

Molar masses (in g/mol)

Assume that Cu2++4NH3 --> Cu(NH3)42+ is the only important reaction.

Explanation / Answer

The overall formation constant for Cu(NH3)42+ is 1.1x1013 at 25oC. What is [Cu2+

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