Practical Physical Chemistry

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Longmans, Green, 1920 - Chemistry, Physical and theoretical - 327 pages
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Page 158 - Since in the aqueous solution of a salt of a weak base and a strong acid, or of a weak acid and a strong base, there is an equilibrium between the salt, the free...
Page 85 - ... c. The liquid is then allowed to flow back through the capillary, and the time required for the surface of the liquid to pass from the mark c to the mark d is noted.
Page 301 - OF SOLIDS IN LIQUIDS When a solid is brought into contact with a liquid in which it is
Page 131 - After several minutes, when the thermometer will have taken up the temperature of the bath, strike the upper end of the thermometer against the palm of the hand so as to cause the excess of mercury to break off from the end of the capillary.
Page 84 - Force=?7 x -, x where 17 is a constant known as the coefficient of viscosity. When the velocity of displacement of two layers is equal to the distance between the layers (v=x), the force per unit area becomes equal to the coefficient of viscosity. This gives the definition of the latter quantity.
Page 97 - Of two substances, the one which has the greater absolute index of refraction is said to be the more dense optically. When a ray passes from a less dense to a more dense medium, it is bent toward the normal as shown in...
Page 85 - If, now, the same volume of a second liquid is introduced into the tube, the mean difference of level of the two liquid surfaces will also be h, so that the driving force is now h X s, X g; or the driving force is proportional to the densities of the two liquids.
Page 302 - Despite its many forms, it should be particularly noted that the solubility curve of any substance is continuous, so long as the solid phase, or solid substance in contact with the solution, remains unchanged. If any
Page 85 - ... rise of temperature could be roughly compared in the two cases ; but in order to avoid part, at least, of the initial disturbance, I propose to exhaust the two globes simultaneously (Fig. 8), and have one limb of the gauge in connection with each globe. With the apparatus so arranged, the ultimate difference of level of the liquid in the two limbs of the gauge will indicate the difference of temperature which existed in the two globes at the instant when the expansion was complete. With a water...
Page 83 - ... have regarded the cylinder of liquid made up, and it has been found that the force per unit area which is necessary to maintain this condition is proportional to the difference of velocity, v, of two adjacent tubes (or their relative velocity of displacement), and inversely proportional to their distance, x, apart, ie — Force = 17 x where 17 is a constant known as the coefficient of viscosity.

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