NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...
Thermodynamic modeling of the system Al2O3–MgO was performed several times59,60,61,62,63. There is a considerable solid solubility of corundum in periclase at high temperatures (up to 9.6 mol. % Al2O3at 2270 °C), but it rapidly lowers with the temperature decrease64, and at t...
Close agreement between calculated and experimentally determined equilibrium constants for acid dissociation reactions and cation hydrolysis reactions supports the generality and validity of these predictive methods. These data facilitate the calculation of the speciation of major, minor, and trace elements in...
Coupling this model to changes in solution pH is achieved by using [H3O(+)] as a parameter in the definition of the formation equilibrium constants used; the influence of external pressure is evaluated using Planck's equation. This approach predicts that changes in external pressure will induce ...
Importantly, we derive a universal equation governing the adsorption-based synthesis of graphene over a wide range of temperatures in both catalytic and spontaneous growth regimes. Experimental results support the equation, highlighting the catalytic function of γ-Al2O3 at low temperatures. The ...
13 Each dislocation in such a pair is of the 1/2<110> type (but see discussion below on further dissociation). This Burgers vector is the same as that observed in disordered FCC metals and alloys—see e.g. [43] for a concise overview of dislocations in FCC metals). A dislocation ...
Which ion is the weakest base? A) CH_3CH_2O^- B) hydroxide ion C) acetate ion D) CH_3^- What is the acid dissociation for H2CO3(aq) + H2O(l)? Which of the following solutions is acidic? a.\left ( OH^- \right )=1.0\times 10...
O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-SiO2-TiO2-H2O-CO2 A revised equation is proposed to represent and extrapolate the heat capacity of minerals as a function of temperature:CP=k0+k1T−0.5+k2T−2+k3T−3(where k1, k2≤0).
acalculated from equation (1). bcalculated pKa = (− log Ka). cerrors limits are standard ( )d (In K) d 1 T = ∆H R (2) d (pKa) dT = ∆H 2.303 RT 2 (3) ∆H° is assumed constant and independent of temperature. When the dissociation is ...
Positive linear trends have been found between Vickers hardness and Young's modulus E2,3. According to the Makishima and Mackenzie model, the Young's modulus E, bulk modulus K, and shear modulus G of glasses are related to both the dissociation energy per unit volume of the components and ...