Concentration molality

Experiments on sufficiently dilute solutions of non-electrolytes yield Henry s laM>, that the vapour pressure of a volatile solute, i.e. its partial pressure in a gas mixture in equilibrium with the solution, is directly proportional to its concentration, expressed in any units (molar concentrations, molality, mole fraction, weight fraction, etc.) because in sufficiently dilute solution these are all proportional to each other. [Pg.360]

Chemists traditionally use m to designate moiaiity, but this symbol easily leads to confusion because m also represents mass. For this reason, we use the symbol Cm (concentration, molal) for molality. [Pg.831]

Each concentration measure is convenient for some types of calculations but inconvenient for others. Consequently, a chemist may need to convert a concentration from one measure to another. Example illustrates the conversion from a mass-based concentration, percent by mass, to a mole-based concentration, molality. Mole... [Pg.832]

Figure 1.52. Uniformly mixed kinetics model. q volume flow rate (m /s), Cj initial concentration (molal), 1 height (m), r radius (m), C concentration (molal), V volume of the system (m ).

Species Total concentration mg kg-1 molal Free concentration molal % of total Complexes % of total... [Pg.85]

Table 7.3. Concentrations (molal) of predominant iron species in Morro do Ferro groundwater, calculated assuming equilibrium and redox disequilibrium...

Fig. 15.11. Concentrations (molal) of the predominant carbonate species over the course of a reaction path in which NaOH is added to a fluid that maintains equilibrium with C02 in the atmosphere.

Figure 5.12. Electrode potential of Ag/Ag electrode as a function of Ag concentration. Molality is the concentration expressed as gram-molecules or gram-ions solute per liter (55 mol) of water. (From Ref. 5, with permission from Van No strand Reinhold.)...

Note 1 The solute concentration is most frequently expressed in terms of mass concentration, molality or volume fraction. If expressed in terms of mass concentration or molality, the corresponding refractive index increments are referred to as specific or molal refractive index increments, respectively. [Pg.60]

The (able below contains solubility and density data lor the salts Na SQ4 and MgS()4. Express their solubilities in terms of molar concentrations, molalities and mole fractions. Calculate the contractions in volume that occur when the solutions are made from the solid salts and the solvent. Comment on the results in terms of the ell ect of ionic charges. The concentrations have been cho-.cn to be comparable. [Pg.12]

Additive Concentration (molal) (unless otherwise stated) Cloud point (°C) /Cs Correlation coefficient... [Pg.27]

Here, p and m are the standard chemical potential and concentration (molal scale) of the /-component (z = 1 for solvent, z = 2 for biopolymer) A2 is the second virial coefficient (in molal scale units of cm /mol, i.e., taking the polymer molar mass into account) and m° is the standard-state molality for the polymer. [Pg.82]

A 0.025 M solution of monobasic acid had a freezing point of —0.060°C. What are Ka and pKa for the acid Assume that at this low concentration, molality is equal to molarity. [Pg.306]

Activity coefficient the ratio of the activity (of an electrolyte) as measured by some property, such as the depression of the freezing point of a solution, to the true concentration (molality). It is usually less than 1 and increases as the solution becomes more dilute, when the attractive forces between oppositely charged ions become negligible. [Pg.512]

Figure A.l. displays the various forms of writing equilibrium constants involving pressure, concentration, molality, mole fractions and fugacity etc - for a general reaction of the form ...

$Figure A.l. displays the various forms of writing equilibrium constants involving pressure, concentration, molality, mole fractions and fugacity etc - for a general reaction of the form ...$

I I electrolyte, HCI Concentration, molal Mean activity coefficient 2 1 electrolyte, CaClj Concentration (moles dm ) Mean activity coefficient 2 2 electrolyte, CdSO Concentration, molal Mean activity coefficient... [Pg.267]

Concentration (molality) Value of tf for HCl (nm) Concentration (molality) Value of a for LiCl (nm)... [Pg.285]

If a is the initial concentration (molality) of the weak or moderately weak acid HA, and h is the amount of strong, monoacid base MOH added at any instant, then h is also equal to mM > the molality of ions at that instant, since the salt MA produced on neutralization may be taken as being completely dissociated. The acid HA is only partially neutralized to form A ions, and so... [Pg.323]

Ion Counter- ion Concentration (molality) Ion-water distances (A) Hydration number ( MO Tilt angle 0 (deg) Method / reference... [Pg.204]

As shown in eq. (2), the ion activity is directly related to the molal concentration. Molal concentrations, as determined with direct-measuring ion-selec-... [Pg.62]

Potential Measurements of Cell Pt,H2(1 atm] HCI(/n),AgCI(sat d) Ag without Liquid Junction as a Function of Concentration (molality) and Temperature (°C) ... [Pg.557]

The value of AT], is proportional to the vapor-pressure lowering, and so it is also proportional to the concentration (molality) of the solution. That is,... [Pg.484]

FOLLOW-UP PROBLEM 13.7 What is the minimum concentration (molality) of ethylene glycol solution that will protect the car s cooling system from freezing at 0.00°F (Assume the solution is ideal.)... [Pg.411]

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