Finding the Ratio of Uncomplexed Zn2+ to Zn(NH3)2+ Using Stability Constant

In summary, the ratio of the uncomplexed Zn+2 ion in a solution with a stability constant of [Zn(Nh3)4]+2 of 3x10^9 is dependent on the concentration of NH3. Knowing the volume or number of moles is not necessary to calculate this ratio, as it can be determined by comparing the concentrations of uncomplexed Zn2+ and Zn(NH3)2+. The Ksp equation can be used as a starting point for this calculation.
  • #1
CosmicC
< Mentor Note -- New user has been reminded to use the Homework Help Template when posting schoolwork questions >

What is the ratio of the uncomplexed Zn+2 ion in a solution that is 10M in NH3, if the stability constant of [Zn(Nh3)4]+2 is 3x10^9.

I am not able to understand why they have given 10M NH3 since we don't know volume or enough info to get moles. We have only stability constant.
 
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  • #2
You do not need to know the volume or number of moles to figure out the ratio. You can just calculate a ratio of the concentration of uncomplexed Zn2+ to the concentration of the Zn(NH3)2+. A good starting point is to write out the equation for the Ksp for the formation of the complex.
 

1. What are coordination compounds?

Coordination compounds are molecules or ions that consist of a central metal atom or ion bonded to one or more surrounding molecules or ions, known as ligands. These ligands form coordinate covalent bonds with the metal atom, resulting in the formation of a complex compound.

2. How are coordination compounds different from other compounds?

Coordination compounds are unique in that they have a central metal atom or ion that is surrounded by ligands, which are typically Lewis bases. This results in the formation of complex structures and often leads to interesting physical and chemical properties, such as color and magnetic behavior.

3. What is the role of ligands in coordination compounds?

Ligands play a crucial role in coordination compounds as they are responsible for bonding to the central metal atom or ion. The type and number of ligands attached to the metal atom can greatly affect the properties of the coordination compound.

4. How are coordination compounds named?

The naming of coordination compounds follows a specific set of rules outlined by the International Union of Pure and Applied Chemistry (IUPAC). The name typically includes the name of the metal atom or ion, followed by the names of the ligands in alphabetical order and the oxidation state of the metal atom or ion in parentheses.

5. What are some real-life applications of coordination compounds?

Coordination compounds have numerous practical applications in fields such as medicine, biology, and industry. They are often used as catalysts in chemical reactions, as well as in the production of pigments, fertilizers, and pharmaceuticals. Coordination compounds are also used in imaging techniques in medical diagnostics and as anti-cancer agents.

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