Basicity of acids

Basicity of Acids.—It has been found that the difference 

For the purpose of this experiment, sodium hydroxide free from carbonate is required. This is best prepared as follows Metallic sodium in roughly weighed amount, according to the quantity and strength of the solution required, is freed from the adhering paraffin or other liquid, and from the crust of oxide, and placed in the funnel F (Fig. 64), made of nickel 

The operation can, if desired, be hastened by passing steam through a coil of lead or compo. tubing, T, placed in the water in the basin. The vaporization of the water is thereby increased, and the action on the sodium accelerated. Care must, however, be exercised, especially if large amounts of sodium are being acted on, that the action does not become too vigorous and it is advisable to discontinue the passage of steam from time to time, so that the vaporization of the water under the bell-jar does not become excessive. 

To prevent the condensed steam from blocking up the heating tube, it is well to coimect the exit end of the latter to a filter pump, a condensing bottle being inserted to prevent the possible breaking of the pump by the hot steam. 

After all the sodium has been converted to hydroxide, the latter is transferred as rapidly as possible to a bottle containing sufficient distilled COa-free water to make the solution of about the concentration desired. The solution can be standardized by means of succinic add (the solution of which is also prepared with COa-free water), using phenolphthalein as indicator. 

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Understanding the acidity and/or basicity of acids and bases in macrocyclic systems has an important connection to biological problems. It should help us to understand enzymes. In many proteins, drastically varying pKa values have been found for functional groups in the active site for example, the... 

Determination of Basicity of Acids.—From an examination of the conductances of the sodium salts of a number of acids, Ostwald (1887) discovered the empirical relation... 

In Chapter 5, we explain the basics of acids and bases, including how the pH scale was developed to quantify the strength of different acids and bases. It s a simple system that ranges in value from pH 1 to pH 14. 

Gerhardt in a long memoir on the basicity of acids pointed out that equivalents are different from the molecules. Water can be regarded as dibasic acid ... 

A method has been described for determining the basicity of acids based on the alterations which they exhibit in electrolytic conductivity on the addition of alkali. Instead of the telephone and induction coil, a double... 

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