1907 **Abstract:** 1 5 7 1their power of dissolving metals. Lithium is found to be soluble in ethylamine and potassium in ethylenediamine. I n the higher members of the primary amines as well as in the secondary and tertiary amines, the alkali metals are insoluble. T h e behavior of mixed solvents has also been studied. As a rule, the alkali metals are soluble in any inactive solvent containing considerable ammonia, and the solubility is the lower the smaller the amount of ammonia present. If sufficient metal be added to a solve…

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“…Notice in figures 1 and 2 that the normal mutarotations of galactose and glucose remain nearly constant from pH 3 to pH 6, while the rates for the mutarotation of levulose and the rapid mutarotation of galactose rise much more rapidly on either side of pH 4. The effect of hydrogen and hydroxyl ions on the velocity constants for glucose at 25° C was found by Hudson [37] 3 Ratio o( velocity constant at the pH iudicated to tbat a t pH = 4.6, tbe latter measured in 0.005 N pC)-tassium acid phthala te buO'l'r solution 2. Although these expressions are strictly comparable one to the other, they are arbitrary because they are based on measmements made in buffered solutions containing anions of weak acids.…”

confidence: 88%

“…Notice in figures 1 and 2 that the normal mutarotations of galactose and glucose remain nearly constant from pH 3 to pH 6, while the rates for the mutarotation of levulose and the rapid mutarotation of galactose rise much more rapidly on either side of pH 4. The effect of hydrogen and hydroxyl ions on the velocity constants for glucose at 25° C was found by Hudson [37] 3 Ratio o( velocity constant at the pH iudicated to tbat a t pH = 4.6, tbe latter measured in 0.005 N pC)-tassium acid phthala te buO'l'r solution 2. Although these expressions are strictly comparable one to the other, they are arbitrary because they are based on measmements made in buffered solutions containing anions of weak acids.…”

confidence: 88%

“…According to Bronsted and Guggenheim, and others [34,35,36], the mutarotation constant (k t + 1.-2 ) for a sugar in the presence of acid and base catalysts can be represented by an equation of the following type:…”

confidence: 99%

“…-If we have a buffer Solution Containing ammonia and ammonium chloride, eqn. (2) will require the addition of terms for the catalytic effects of the ammonia molecules and of the ammonium ions; fortunately the latter effect is known to be extremely small and may be neglected, so we may write (6) Of course in a buffer solution the hydroxyl ion concentration will vary with the ionic strength and this change will produce a secondary salt effect as described by Brarnsted: we have minimized this salt effect by the well-known expedient of keeping the ionic strength constant by adding sodium chloride, which itself produces no direct catalytic effect. For the rate constant in these conditions we may write (7) from which we see that, if the buffer ratio, cNH,/cNH~+, is kept constant, the values of (kkw) when plotted against cNH, give a straight line of slope kNH3 and a n intercept given by the first term on the right side of the equation : this term may be rewritten as…”

confidence: 99%