Molar solubility The number of moles

Molar solubility The number of moles of a solute that dissolve to produce a liter of saturated solution. 

Molar solubility. The number of moles of solute in one hter of a saturated solution (mol/L). (16.6)... 

Plan (1) Calculate the molar solubility of the slightly soluble salt, which is the number of moles of the salt... 

At concentrations above their aqueous solubility, the so-called c.m.c., low-molar-mass biosurfactants form micelles in the aqueous phase. Micelles are spherical or lamellar aggregates with a hydrophobic core and a hydrophilic outer surface. They are capable of solubilising nonpolar chemicals in their hydrophobic interior, and can thereby mobilise separate phase (liquid, solid or sorbed) hydrophobic organic compounds. The characteristics for the efficiency of (bio)surfactants are the extent of the reduction of the surface or interfacial tension, the c.m.c. as a measure of the concentration needed to bring about this reduction, and the molar solubilisation ratio MSR, which is the number of moles of a chemical solubilised per mole of surfactant in the form of micelles [96]. 

The number of mole of dissolved salt in a one liter solution in the saturated solution is known as molar solubility. It can be represented as s . It is not difficult to find the solubility product of a salt by knowing its molar solubility. For example, the molar solubility of CaS04 at 20 °C is 1.5 10 mol/L. This signifies that the concentration of each of the ions Ca and SO is 1.5 10 mol/L in a saturated solution of CaSO.. 

Write the balanced equation for the dissolution reaction, and define x as the number of moles per liter of AgCl that dissolves. Then, express the equilibrium concentrations in terms of x and substitute them into the appropriate equilibrium equation. Solving for x gives the molar solubility. 

As is discussed later, a molar activity coefficient ym may be defined such that Sym is 1.0 where S is the molar solubility i.e., in units of mol/litre. Since S is 55.5 x, ym is y/55.5, 55.5 being the number of moles of water in 1 litre of solution. 

The molar solubility of a compound is the number of moles that dissolve to give one liter of saturated solution. 

Molality is expressed as the number of moles of solute dissolved per kilogram of solvent, and is therefore independent of temperature since all of the quantities are expressed on a temperature-independent weight basis. The molality of a solution is useful in describing solubility-related phenomena at various temperatures, and as the concentration unit of colligative property studies. When the density of the solvent equals unity, or in the case of dilute aqueous solutions, the molarity and the molality of the solution would be equivalent. 

Sometimes the fluid concentration is expressed in the units M, m, and N. M is an abbreviation of the solubility unit, molarity, which is the number of moles (or gram formula weights) of solute in one liter (L) of solution. The abbreviation m is another unit, molality, which is the number of moles (or gram formula weights) of solute in one kilogram of solvent. A molar concentration is labeled with a square bracket. The unit of N is meq/mL. The unit of... 

The solubility is the quantity of a substance that dissolves in a certain quantity of water. In solubility equilibria calculations, it is usually expressed as grams of solute per liter of solution. Molar solubility is the number of moles of solute per liter of solution. 

Plan We are given the solubilities in various units and must find K p. Por each compound, we write an equation for its dissolution to see the number of moles of each ion, and then write the ion-product expression. We convert the solubility to molar solubility, find the molarity of each ion, and substitute into the ion-product expression to calculate K p. Solution (a) Por PbS04. Writing the equation and ion-product (K p) expression ... 

It is convenient to define the solubility of ionic substances in units of g per 1000 g of saturated solution, or as the number of moles of substance needed to produce 1 dm of saturated solution. Molar solubility is defined as follows ... 

The solubility product depends on the temperature, and at a given temperature it is constant for a particular ionic compound. Molar solubility is defined as the number of moles of solute dissolved in one liter of its saturated solution. Using the molar solubility of a compound, the solubility product of that compound can be determined or vice versa. 

It is important to distinguish carefully between solubility and the solubility-product constant. The solubility of a substance is the quantity that dissolves to form a saturated solution. (Section 13.2) Solubility is often expressed as grams of solute per liter of Solution (g/L). Molar solubility is the number of moles of solute that dissolve in forming 1 L of saturated solution of the solute (mol/L). The solubility-product constant (K p) is the equilibrium constant for the equilibrium between an ionic solid and its saturated solution and is a unitless number. Thus, the magnitude of is a measure of how much of the solid dissolves to form a saturated solution. 

As implied by Equation 14b, a polymer with multiple hydroxyl groups will react with pentavalent or trivalent phosphorous electrophiles to crosslink the polymer if a molar excess of the phosphorus compound is present. This was verified by Doughty, who found that phosphorous halide or sulfide/lignin reactions with a greater than 1/1 mole ratio produced insoluble products (183). If the number of moles of phosphorous compound are equal or less than the moles oflignin in the reaction, the soluble reaction product can be further reacted with mono and polyhydroxy compounds to produce flame retardant resins with film- forming capacity (185). 

Strategy In each part, we can calculate the number of moles of compound dissolved in one liter of solution (the molar solubility). Then, from the molar solubility, s, we can determine sp-... 

There are two other ways to express a substance s solubility molar solubility, which is the number of moles of solute in 1 L of a saturated solution (mol L ), and solubility, which is the number of grams of solute in 1 L of a saturated solution (g L ). Note that both these expressions refer to the concentration of saturated solutions at some given temperature (usually 25°C). 

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