Reference no: EM132362976

Oxalic acid (C₂H₂O₄) has the following structure:

An oxalic acid solution contains the following species in varying concentrations: C₂H₂O₄, C₂HO₄^-, C₂O₄^2-, and H⁺.

a. Draw Lewis structures of C₂HO₄^- and C₂O₄^2-.

b. Which of the above four species can act only as acids, which can act only as bases, and which can act as both acids and bases?

Classify each of the following species as a Lewis acid or a Lewis base: (a) CO₂, (b) H₂O, (c) I^-, (d) SO₂ , (e) NH₃, (f) OH^-, (g) H⁺, (h) BCl₃.

Describe the following reaction in terms of the Lewis theory of acids and bases:

AlCl₃(s) + Cl^-(aq) → AlCl₄^-(aq)

Which would be considered a stronger Lewis acid: (a) BF₃ or BCl₃, (b) Fe⁺² or Fe⁺³? Explain.

Complete the following statements for the complex ion [Co(en)₂(H₂O)CN]²⁺

1. en is the abbreviation for:
2. The oxidation number of Co is:
3. The coordination number of Co is:
4. ______ is a bidentate ligand.

Give the oxidation numbers of the metals in the following species:

1. K₃[Fe(CN)₆]
2. K₃[Cr(C₂O₄)₃]
3. [Ni(CN)₄]^2-

 What are the systematic names for the following ions and compounds?

1. [Co(NH₃)₄Cl₂]⁺
2. Cr(NH₃)₃Cl₃
3. [Co(en)₂Br₂]⁺
4. [Co(NH₃)₆]Cl₃

Write the formulas for each of the following ions and compounds:

1. tetrahydroxozincate(II)
2. pentaaquochlorochromium(III)
3. tetrabromocuprate(II)
4. ethylenediaminetetraacetatoferrate(II)

Oxalic acid, H₂C₂O₄, is sometimes used to clean rust stains from sinks and bathtubs. Explain the chemistry underlying this cleaning action.

The label of a certain brand of mayonnaise lists EDTA as a food preservative. How does EDTA prevent the spoilage of mayonnaise?