Is sodium hexametaphosphate soluble in water?

Sodium hexametaphosphate

What is the purpose of adding sodium hexametaphosphate solution?

Sodium Hexametaphosphate (SHMP) is a dry powder dispersion agent mixed into soil hydrometer solutions to prevent clay platelets from sticking together in the sedimentation solution. Required in hydrometer analysis of soils to determine silt and clay fractions.

How do you make sodium hexametaphosphate solution?

Crush 250 g of sodium hexametaphosphate into a clean, dry, receptacle. Place 900 mL of distilled water into a pan and gently heat, do not boil. Add sodium hexametaphosphate slowly while stirring, make sure it is fully dissolved. Remove solution from heat, pour into a graduated cylinder.

Is sodium polyphosphate the same as sodium hexametaphosphate?

Sodium hexametaphosphate is a mixture of polymeric metaphosphates, of which the hexamer is one. It is more correctly called sodium polymetaphosphate.

What is the role of sodium hexametaphosphate in the precipitation method is?

As a first guideline, for water with high calcium content you can add 0.5 mg/dm3 of sodium hexametaphosphate, (NaPO3)6, to prevent CaCO3 scaling. To protect from Fe or Mn precipitation, which can occur with O2 or Cl2 dissolved, pH should be above 8.

How is sodium hexametaphosphate useful in removing the permanent hardness of water?

Adding Calgon to rough water results in sodium ions being separated from Calgon’s anion by hard water calcium and magnesium ions. The effect is the extraction from hard water, in the form of a Calgon complex, of calcium and magnesium ions. It softens the water and releases sodium ions.

What is the role of Calgon in particle size determination?

Calgon (a combination of sodium hexametaphosphate and sodium carbonate) has proved to be the most effective dispersing agent in determining the grain size distribution of fine-grained soils by means of the hydrometer analysis.

How do you calculate soil particle size?

In soil analysis, the proportion of gravel and larger particles is determined by first grinding the soil to disaggregate it and then passing it through a 2 mm sieve. What remains in the sieve is weighed and it’s proportion calculated as a percentage of the whole soil sample.

How do you make a 5% sodium hexametaphosphate solution?

6.1 Dispersing solution, 5%: Dissolve 50 g of sodium hexametaphosphate, Na6(PO3)6 in deionized water and dilute to 1 liter.

What is the purpose of sodium polyphosphate?

It’s an additive—called sodium tripolyphosphate, or STPP for short—and it is used to make your seafood appear firmer, smoother and glossier. Seafood manufacturers may soak your seafood in a quick chemical bath of STPP in order to achieve these effects.

Is hexametaphosphate unhealthy?

MAY CAUSE IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT. MAY BE HARMFUL IF SWALLOWED OR INHALED.

Is used as stabilizing agent used in precipitation of barium sulphate?

Abstract. We describe the synthesis and structure of Barium sulfate nanoparticles by precipitation method in the presence of water soluble inorganic stabilizing agent, sodium hexametaphosphate, (NaPO3)6.

What are the MSDS for sodium hexametaphosphate ( SHMP )?

1 Sodium Hexametaphosphate MSDS. 2 Product Name: Sodium Hexametaphosphate (SHMP). 3 Synonyms: Glass H, Hexaphos, Sodaphos, SHMP; glassy Sodium Phosphate; Sodium. 4 Polyphosphate, glassy; Metaphosphoric Acid, Sodium Salt; Sodium Acid. 5 Metaphosphate; Graham’s Salt. 6 (more items)

What is the empirical formula for sodium hexametaphosphate?

From Wikipedia, the free encyclopedia Sodium hexametaphosphate (SHMP) is a salt of composition Na 6 [ (PO 3) 6 ]. Sodium hexametaphosphate of commerce is typically a mixture of metaphosphates (empirical formula: NaPO 3), of which the hexamer is one, and is usually the compound referred to by this name.

How is sodium hexametaphosphate prepared in monosodium pyrophosphate?

Preparation. SHMP is prepared by heating monosodium orthophosphate to generate sodium acid pyrophosphate: 2 NaH 2 PO 4 → Na 2 H 2 P 2 O 7 + H 2 O. Subsequently, the pyrophosphate is heated to give the corresponding sodium hexametaphosphate: 3 Na 2 H 2 P 2 O 7 → (NaPO 3) 6 + 3 H 2 O. followed by rapid cooling. Reactions

What is sodium hexametaphosphate used for in toothpastes?

It is used as an active ingredient in toothpastes as an anti-staining and tartar prevention ingredient. The energy drink NOS contains sodium hexametaphosphate.