Indicator choice

This implies, with the indicated choice of hard sphere diameter d, that the compressibilities of tlie reference system and the equivalent of the hard sphere system are the same. 

Furnaces of this type, such as the steam locomotive furnace—boHet design, had the obvious disadvantage that pressure was limited to ca 1 MPa (150 psi). The development of seamless, thick-waH tubing for stationary power plants (ie, water-tube furnaces) and other engines for motive power, such as diesel—electric, has in many cases ecHpsed the fire-tube boHet. For appHcations calling for moderate amounts of lower pressure steam, however, the modern fire-tube boHet continues to be the indicated choice (5). 

The second reason the indicator choice is critical is really an extension of the first reason. For weak acids, the pH at the equivalence is greater than 7.0. Because the pH changes gradually and because the pH is greater than 7, it is important to select an indicator, like phenolphthalein, that will change color in a range of pH values between 8 and 10. 

Bromthymol blue is a good indicator choice since it changes color at pH 7 (from base color to acid color). 105. Since the equivalence point occurs at pH = 8.9, phenolphthalein would be a good indicator choice because it changes color at pH 9 (from acid color to base color). 107. a. 6.7 x 10-6 M-, b. 1.2 x 10 13 M c. No, since Q (= 2.3 x 10—21) is less than the Ksp value. 

Titrations requiring the use of colour-change indicators often suffer from the lack of an indicator reacting in the equivalence point zone required. There is no lack of indicators to chose from for neutralisation titrations there is often, however, a lack of indicator choices to meet the requirements of precipitation, complexation and oxidation-reduction titrations. 

The usual input device is a keyboard which may contain 90 or more keys. For the novice computer user, simply finding the correct key can be a daunting task, so alternative input devices have been developed. These include touch-sensitive screens, tracker balls, light pens and so on. Perhaps the most common alternative to the keyboard is the mouse. This is simply a small box with one or more buttons on the top and a tracker ball on its underside. The mouse is connected to the computer via a single cable. As the mouse is moved over a flat surface, sensors detect the movement of the ball and the computer can calculate the position of the mouse. An arrow or similar symbol is usually displayed on the screen and this symbol moves in synchrony with the mouse. The mouse can be used to move the symbol to indicate choices on the screen and these can then be selected by pressing one of the buttons on the mouse. While experienced computer-users sometimes complain that mouse-based... 

NODES are related to the OR-NODEs via the SUBGOAL relation, the OR-NODEs indicate CHOICES of AND-NODEs and the AND-NODES in turn INCLUDE any number of NODES... 

Optimal abdominal MDCT data acquisition for 3D evaluation is determined by the scanner available, clinical indication, choice of oral and IV contrast material, and knowledge of the risks of radiation. A list of the current NYU MDCT protocols for specific indications are listed at the end of this chapter. These protocols were developed to allow optimal CT data acquisition for both 2D and 3D data interpretation while trying to limit radiation dose to the patient. By obtaining thin section MDCT data, 3D data interpretation is facilitated by the use of isotropic voxels which enable both MPR and volume rendering to be performed. 

Hydrogennon corKentration, pH, and indicator choice are explored in this demonstration, tee R. Summerlin, Christie L. Borgford, and Julie B. Ealy, "Colorful Effects of Hydrcxliloric Acid Dilution," Chemical Demonstrations. A Sourcebook for Teachers, Vol. 2 (American Chemical Sodely, Washington, DC, 1988) pp. 177-178. 

In order to conserve symmetry in a natural way, without introducing complicated constraints on the individual orbitals, we may first observe that the three components of a P state, with open-shell orbitals U, V, IV = 2px, 2py, 2p respectively, must all possess exactly the same energy and that a normalized combination V = aW bWy + cW (subscripts indicating choice of the 2p orbital) would yield an identical energy... 

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