Practical Physical Chemistry |
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accuracy alkali allowed Amer amount angle aniline apparatus aqueous bath benzene benzoic acid boiling boiling-point bridge wire bulb burette cadmium calculated calomel calorimeter capillary tube carbon carried cell cent Chem chloride concentration conductivity connected constant copper cork correction cubic centimetres decomposition potential degree density determined dilute distilled water electrical electrode employed equal experiment EXPERIMENT.-Determine flame flask freezing-point given glass tube heat hydrochloric acid hydrogen hydrolysis ionization ions latter liquid litre means measurements meniscus mercury metal method methyl acetate molecular weight obtained passes pipette placed platinum point of balance position potassium potassium chloride potential pressure prism pyknometer quantity reaction refractive index regulator resistance rotation salt screw shown in Fig side tube silver silver nitrate sliding contact sodium solubility solvent stirrer stopper substance sulphate suspensoids telescope temperature thermometer thermostat tion titration transition point vapour velocity vessel volume wave-length zinc ΙΟ
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Page 268 - OF SOLIDS IN LIQUIDS When a solid is brought into contact with a liquid in which it is
Page 117 - 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 82 - 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 72 - If 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 will now be hx d2 xg ; or the driving force is proportional to the densities of the two liquids.
Page 268 - 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 100 - C. ; 1, the length of the tube in decimeters; c, the number of grams of active substance in 100 cc of solution ; p, the number of grams of active substance in 100 grams of solution; and d, the density.
Page 72 - ... 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 70 - ... 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...
Page 72 - V is the volume of the liquid displaced by the film, p is the density of the liquid, and g is the acceleration of gravity.
Page 119 - ... does not strike against the bulb of the thermometer. (2) Remove the thermometer and stirrer from the tube. Clean and dry the latter. (3) Pipette in 25 cc of urine. (4) Set the Beckmann thermometer so that, at 0° C., the mercury stands not lower than the middle of the scale. (5) Dry the thermometer and insert it along with the stirrer in the freezing-point tube, so that the bulb of the thermometer is completely immersed in the urine. (6) Fill the outer cooling vessel with water, ice and salt....