Millimoles

For adsorption on Spheron 6 from benzene-cyclohexane solutions, the plot of N N2/noAN2 versus N2 (cyclohexane being component 2) has a slope of 2.3 and an intercept of 0.4. (a) Calculate K. (b) Taking the area per molecule to be 40 A, calculate the specific surface area of the spheron 6. (c) Plot the isotherm of composition change. Note Assume that is in millimoles per gram. 

Eor products having relatively low specific activity, such as some compounds labeled with and which are synthesized on the scale of several millimoles, classical organic chemical separation methods may be utilized, including extraction, precipitation, and crystallization. Eor separation of complex mixtures and for products having high specific activity, such as those labeled with tritium, etc, chromatographic methods utilizing paper, thin... 

Figure.s for the eartli .s cru.st and die human body are pre.sented a.s percentage.s of die total number of atom.s . seawater data are millimoles per liter. Figures for die earth s cru.st do not include water, whereas figures for die human body do. 

As the molecular weight of H2SO4 is 98.078 it follows that 1 kg contains 10.196 mol hence the predominant ions are present to the extent of about 1 millimole per mole of H2SO4 and the total concentration of species in equilibrium with the parent acid is 4.16 millimole per mole. Many of the physical and chemical properties of anhydrous H2SO4 as a nonaqueous solvent stem from these equilibria. 

The capacity of the resin expressed as millimoles per gram is given by bv/W, where rmL of bM AgNOa are required by Wg of the resin. 

Plot a graph of the total effluent collected against the concentration of halide in each fraction (millimoles per litre). The sum of the titres using 0.3 M sodium nitrate eluant (less blank for each titration) corresponds to the chloride, and the parallel figure with 0.6M sodium nitrate corresponds to the bromide recovery. 

From the results of the titration calculate the millimoles of calcium present in the water. It may be expressed, if desired, as the equivalent mineral acidity (EMA) in terms of mg CaC03 per litre of water (i.e. parts per million of CaC03). In general, if the titre is A mL of sodium hydroxide of molarity B for an aliquot volume of V mL, the EMA is given by (AB x 50 x 1000)/V... 

B. Concentration of the metal ion to he titrated. Most titrations are successful with 0.25 millimole of the metal ion concerned in a volume of 50-150 mL of solution. If the metal ion concentration is too high, then the end point may be very difficult to discern, and if difficulty is experienced with an end point then it is advisable to start with a smaller portion of the test solution, and to dilute this to 100-150 mL before adding the buffering medium and the indicator, and then repeating the titration. 

When applied on a macro scale — samples of 1 - 5 millimoles — generation rates of 100-500 milliamps are required parasitic currents may be induced in the indicator electrodes at currents in excess of about 10-20 mA consequently precise location of the equivalence point by amperometric methods is not trustworthy. 

The Karl Fischer procedure was applied to the determination of water present in hydrated salts or adsorbed on the surface of solids. The procedure, where applicable, was more rapid and direct than the commonly used drying process. A sample of the finely powdered solid, containing 5-10 millimoles (90-180 mg) of water, was dissolved or suspended in 25 mL of dry methanol in a 250-mL glass-stoppered graduated flask. The mixture was titrated with standard Karl Fischer reagent to the usual electrometric end point. A blank titration was also carried out on a 25 mL sample of the methanol used to determine what correction (if any) needed to be applied to the titre obtained with the salt. 

The activities of some supported catalysts formed by using different organometallic compounds are given in Table I. In all the cases the activity referred to one millimole of the transition metal increased sharply... 

The symbol m is often read molar it is not an SI unit. Note that 1 mol-L 1 is the same as 1 mmol-ml 1. Chemists working with very low concentrations of solutes also report molar concentrations as millimoles per liter (mmol-L-1) and micromoles per liter (pmol-I 1). 

Figure 4. Graphs of fluorescence quantum yield and phosphorescence quantum yield ( ) versus log of the ratio of millimoles of dissolved sodium acetate to millimoles of p-aminobenzoic acid anion. (Reproduced from reference 12. Copyright 1988 American Chemical Society.)...

Molar concentrations in millimoles (quantities in parentheses are total ionic strengths calculated from Equation 4), (O) 0.22mM 0.55mM SLS (V) l.OSmM SLS (0 )... 

ECF. Note that phosphorus is the major anion within the cells. Given this distribution, serum phosphate concentration does not accurately reflect total body phosphorus stores. Phosphorus is expressed in milligrams (mg) or millimoles (mmol), not as milliequivalents (mEq). Because phosphorus is the source of phosphate for adenosine triphosphate (ATP) and phospholipid synthesis, manifestations of phosphorus imbalance are variable. 

Potassium is the second most abundant cation in the body and is found primarily in the intracellular fluid. Potassium has many important physiologic functions, including regulation of cell membrane electrical action potential (especially in the myocardium), muscular function, cellular metabolism, and glycogen and protein synthesis. Potassium in PN can be provided as chloride, acetate, and phosphate salts. One millimole of potassium phosphate provides 1.47 mEq of elemental potassium. Generally, the concentration of potassium in peripheral PN (PPN) admixtures should not exceed 80 mEq/L (80 mmol/L). While it is safer to also stick to the 80 mEq/L (80 mmol/L) limit for administration through a central vein, the maximum recommended potassium concentration for infusion via a central vein is 150 mEq/L (150 mmol/L).14 Patients with abnormal potassium losses (e.g., loop or thiazide diuretic therapy) may have higher requirements, and patients with renal failure may require potassium restriction. 

The numeric value is the same in mmol/mL as in mol/L. Thus, molarity can be defined as the number of millimoles of solute per milliliter of solution. 

The number of millimoles of NaOH is exactly the same, since the addition was stopped when the reaction was just complete. Therefore, there is 50.00 mmol NaOH in the volume of NaOH added,... 

---