A. Consider Zn+2 ion. a Carbonate ion is readily present in local waters due the

Question

A. Consider Zn+2 ion. a Carbonate ion is readily present in local waters due the the limestone subsoil. How soluble is Zn+2 carbonate in water (i.e, what is the Ksp for your carbonate)? W Calculate the solubility of Zn+2 carbonate in water in g/mL? o Propose an agent that will replace carbonate and reduce the concentration of free Zn+2 by at least 10 times. d. Houses in the country along the river have septic tanks and as a result the detergent additive EDTA (H,Y) has polluted the riverand is present as H,Y. Will EDTA preferentially replace carbonate in reaction with Zn+2? Will EDTA compete with your proposed solution in (c)? Show the reactions and the math to support your contention. e. What is the toxicity of Zn+2? Zn+2 carbonate?? Your proposed Zn+2 solution? Zn+2 EDTA? f. Discuss the feasibility of removing XX ion through precipitation or complexation, Is this practical, or are there other problems inherent in your solution?

Explanation / Answer

b) Ks = [Zn2+][CO32-]

This concentrations are Molar, then, you should change to g/mL

take in count that [Zn2+]=[CO32-]

c) You should search a complexant agent with a complexation constant ten times higher than for carbonate. (or pK one unit higher).

d) calculates the equilibrium constants for H2Y2- (This is dependent on pH) and CO32- with zinc. The biggest constant will be the one that completes the metal.

f) This will depend on whether the precipitates are not very soluble, whether gels, small particles, agglomerates, etc. are formed. Also if there are any other ions competing for the complexation

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.