It is a white, granular or crystalline solid, highly soluble in water, producing an alkaline solution. TSP is used as a cleaning agent, builderlubricant, food additive, stain remover, and degreaser. Most often found in white powder form, it can also be called trisodium orthophosphate or simply sodium phosphate.
Trisodium phosphate is produced by neutralization of phosphoric acid using sodium carbonatewhich produces disodium hydrogen phosphate. The disodium hydrogen phosphate is reacted with sodium hydroxide to form trisodium phosphate and water.
Trisodium phosphate was at one time extensively used in formulations for a variety of consumer-grade soaps and detergents, and the most common use for trisodium phosphate has been in cleaning agents. In combination with surfactantsTSP is an excellent agent for cleaning everything from laundry to concrete driveways. This versatility and low manufacturing price made TSP the basis for a plethora of cleaning products sold in the midth century. TSP is still sold and used as a cleaning agent, but since the late s, its use has diminished in the United States and many other parts of the world because, like many phosphate-based cleaners, it is known to cause extensive eutrophication of lakes and rivers once it enters a water system.
TSP is commonly used after cleaning a surface with mineral spirits to remove hydrocarbon residues and may be used with household chlorine bleach in the same solution without hazardous reactions. Although it is still the active ingredient in some toilet bowl-cleaning tablets, TSP is generally not recommended for cleaning bathrooms because it can stain metal fixtures and can damage grout.
It is prepared using NaOCl in place of some of the base to neutralize phosphoric acid. In the U. The flux is applied as a concentrated water solution and dissolves copper oxides at the temperature used in copper brazing. Residues are water-soluble and can be rinsed out before plumbing is put into service. TSP is used as an ingredient in fluxes designed to deoxygenate nonferrous metals for casting.
It can be used in ceramic production to lower the flow point of glazes. TSP is still in common use for the cleaning, degreasing, and deglossing of walls prior to painting.
TSP breaks the gloss of oil-based paints and opens the pores of latex-based paint, providing a surface better suited for the adhesion of the subsequent layer. Sodium phosphates including monosodium phosphatedisodium phosphateand trisodium phosphate are approved as food additives in the EU. They are commonly used as acidity regulators and have the collective E number E Trisodium phosphate has gained a following as a nutritional supplement that can improve certain parameters of exercise performance.
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Views Total views. Actions Shares.Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. The relative amounts depend on the 3 equilibrium equations, and the total concentration of all of the phosphate species. For phosphoric acid the three pKa's are different enough so that only two phosphate species will have a "significant" concentration at whatever pH the solution is at.
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Here is where the answer gets fuzzy. What is "significant"? However if you want to account for So the gist is how many significant figures do you need to consider in the calculations? What is typically done is to simply the four equilibrium equations to the two "significant" ones maybe only 1 species at high or low pH'sand then calculate the concentrations of the last two species using the found concentrations of the first two.
In reality there is another consideration. There are only three significant figures in each of these equilibrium constants. Only the mantissa counts, not the characteristic. So you can only have three significant figures for any given phosphate species. An "exact" iterative solutionconsidering all four species, can easily be solved via a computer program, but it is really messy to do such a calculation by hand.
For phosphoric acid if the assumption doesn't hold to three significant figures, then normalizing the calculated values would yield a "good enough" result to 3 significant figures. This mixture can be considered as phosphate buffer as pKa3 of phosphoric acid is very high a weak acid. Sign up to join this community.Polymyxin b sulfate and trimethoprim for eyes
The best answers are voted up and rise to the top. Ask Question. Asked 4 years ago. Active 4 years ago. Viewed 3k times. Improve this question. Bee Bee 3 3 silver badges 12 12 bronze badges.Type of Reaction for H3PO4 + NaOH = Na3PO4 + H2O
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Condition No information found for this chemical equation Phenomenon This equation does not have any specific information about phenomenon.
In this case, you just need to observe to see if product substance appearing at the end of the reaction. Substances that you need to check are: Na3PO4 sodium phosphate. Advanced Search with assistance of Google Search Engine We have been working with Google to develop an advanced search with results filted with chemistry topic only Click here to find more information about this equation.
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PHƯƠNG PHÁP XÁC ĐỊNH NHANH SẢN PHẨM TRONG CÁC PHẢN ỨNG CỦA HỢP CHẤT PHOTPHO
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The touchdown was overturned on a holding penalty call. For about a half. Then reality sits in. We'll see what kind of boost Cowboys get from a win and a few days off, but this one will be a struggle to put away. Sure, the Giants will get a little surge from the return of Eli Manning as the starting quarterback and the coaching change.
But the Giants have won only two games for a reason. And with nothing to play for, the Giants' early-game boost won't have staying power. The Cowboys need to win out.
They take control in the second half and pull away. The playoff scenarios already look dismal, but the recent win over Washington offered a peek of hope with a month of games to play. A loss to the reeling Giants would rip right back open the wounds of the not-too-distant three-game losing streak and all the questions that came with it.
Dallas postpones that uncomfortable day at least another week. The Cowboys would appear to be slam-dunk winners against the hapless Giants. In the NFL, however, rarely is anything is as it appears.
Lập PTHH theo các sơ đồ NaOH+H3PO4-->Na3PO4+H2O
The Cowboys rally in the fourth quarter against the Giants and their new starting quarterback. Dan Bailey kicks the game-winning extra point. I expect Eli Manning's return to the starting lineup to bring an emotional lift to the Giants, allowing them to build an early lead.
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