Rust staining, removal

Rost-feuer, n. grate fire, -flache, /. grate surface. -fleck, m. rust spot, iron spot, -flecken-wasser, n. rust stain remover, rostfleckig, a. rust-spotted, rust-stained. Rostfrass, m. corrosion (of metals), rostfrei, a..rust-free stainless. 

Rust stain removal involves forming a water soluble oxalate ion complex of iron like pe(C204)3]. The overall reaction is ... 

Products and Uses A chemical in shampoos, cleaning compounds, water softeners, rust stain removers, spot removers, and ink removers. Frequently used as a sequestrant (binds ingredients that affect the final product s appearance, flavor or texture), clarifying agent, and buffering (regulates acidity and alkalinity) agent. 

Lead sulfate, blue basic rust inhibitor, silicones Tetrabutyltin rust inhibitor, textile oils Sodium didodecylbenzene sulfonate rust inhibitor, textile scours Oleth-4 phosphate rust inhibitor, vinyl plastics Lead sulfate, blue basic rust inhibitor, waxes Propylene glycol myristate rust preventive, diesels Calcium sulfate rust preventive, lubricants PEG-75 meadowfoam seed oil rust preventive, oils Glyceryl mono/dioleate rust preventives Diamyl phenol Petrolatum rust removal Ammonium oxalate rust removal, textiles Oxalic acid rust remover Butoxyethanol acetate rust stain removers Oxalic acid dihydrate rust-preventive oils Glyceryl oleate rustproofing... 

This formulation is designed to be used "as is" and is particularly effective in the removal of scale build-up and rust stains. 

Oxalic acid is a poisonous compound but an excellent reducing agent that is used to remove rust stains and to reduce chemicals in the laboratory. Suppose that 25.00 mL of a solution of oxalic acid, H2C204 (4), is titrated with 0.100 M NaOH(aq) and that the stoichiometric point is reached when 38.0 mL of the solution of base is added. To find the molarity of the oxalic acid solution, we proceed as follows ... 

Both Fe(CN)s 4 and Fe(CN)i may be shown, by magnetic measurements (Chap. 25) to be spin-paired type complexes, but most other complexes of Fe(II) and Fe(III), in which, the ligand fields are weaker, are spin free, Other important complexes of Fe(III) are the asymmetric Fe(C204)i 3 ion (formed in removal of rust stains with oxalic acid) and the very deep red Fe(SCN)2" ion. Although the intensity of color of the latter complex could scarcely have been predicted, it is interesting that the azide ion (which is the same shape and has the same number of valence electrons as the 8CN ion) forms a Fe(III) complex whose color is almost as deep. 

Oxalic acid is often used to remove rust stains. Explain what properties of oxalic acid allow it to accomplish this task. 

The most common uses of oxalic acid are in tanning leather and removing rust and ink stains. In stain removal, it acts as a reducing agent (a substance that donates electrons to other substances) and is relied on by most dry cleaners for this purpose. Iron rust stains con-... 

Oxalic acid, (COOH)2, is used to remove rust stains and some ink stains from fabrics. A 0.1743-gram sample of impure oxalic acid required 39.82 mL of 0.08915 M NaOH solution for complete neutralization. No acidic impurities were present. Calculate the percentage purity of the (C00H)2. 

Rust stains can be removed from painted surfaces with a solution of oxalic acid, (COOH)2. Calculate the pH of a 0.050 M oxalic acid solution. 

Bleaching Why can t rust stains be removed with bleach ... 

Sodium dithionite Bleaching textiles, pulp and paper removing rust stains... 

Dithionites are useful in removing rust stains, and neutral citrate solutions of Na2S204 were used to remove iron corrosion products from objects recovered from the Titanic. 

USE In cleansing compds, oil-well drilling, water treatment, cheese emulsification, as general sequestering agent, to remove rust stains, as ingredient of one-fluid ink eradicators, in electrodeposition ol metals. 

As a paint and varnish remover as well as a stain remover for ink and rust marks ... 

After gross deposits have been removed as far as practicable, use oxalic acid as for rust stains. Hydrochloric (muriatic) acid and proprietary mixtures based on it are sometimes used, but this approach is not recommended because the action on zinc is too vigorous and it is difficult to rinse off residues. 

Oxalic acid is a toxic substance used by laundries to remove rust stains. Its composition is 26.7% C, 2.2% H, and 71.1% O (by mass), and its molecular weight is 90 amu. What is its molecular formula ... 

My mother still thiirks I m very smart. Forty-eight years ago, I removed rust stains from our bathtub with Coca-Cola. It is the carbonic acid in Coke that removed the iron oxide rust stains from the tub. This is an illustration of the corrosive nature of carbonic acid brought into contact with ferric compounds. The carbotric acid is formed from CO2 dissolved in water. 

Oxalic acid solutions remove rust stains. Draw a complex ion that is likely responsible for this effect. Does it have any... 

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