WitrynaCorrect answers: 2 question: The AHsor for NaF is 82 kJ/mol, and the lattice energy is -923 kJ/mol. If the hydration enthalpy of sodium is 21 kJ/mol more than the hydration enthalpy of fluoride, what are the hydration enthalpies for the sodium and fluoride ions? Use A Hsol= - Hiat + Hydr sodium: -841 kJ/mol; fluoride: -862 kJ/mol O sodium: -431 … WitrynaOne example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to …
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WitrynaBecause the lattice energy depends on the product of the charges of the ions, a salt having a metal cation with a +2 charge (M 2+) and a nonmetal anion with a −2 charge (X 2−) will have a lattice energy four times greater than one with M + and X −, assuming the ions are of comparable size (and have similar internuclear distances).For … Witryna11 kwi 2024 · This study aimed to evaluate the loss of mineral content in the enamel surface in early artificial lesions and to assess the remineralizing potential of different agents by means of SEM coupled with energy-dispersive X-ray analysis (EDX). The analysis was performed on the enamel of 36 molars divided into six equal groups, in … nalanda university is built by
Intermolecular Forces - Definition, Types, Explanation
WitrynaIt is a dry chemical used in fluoridation of drinking water, it should be manually weighed and added to the mixing tank. NaF. Sodium fluoride. Density. 2.56 g/cm³. Molecular Weight/ Molar Mass. 41.98817 g/mol. … WitrynaComplete the Lewis structures of these molecules by adding multiple bonds and lone pairs. Do not add any more atoms. (a) the amino acid serine: (b) urea: (c) pyruvic acid: (d) uracil: (e) carbonic acid: 51. A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass. WitrynaSolve NaF consists of Na+ and F–ions, CsI of Cs+ and I–ions, and CaO of Ca2+ and O2–ions. Because the product Q 1 Q 2 appears in the numerator of Equation 8.4, the lattice energy increases dramatically when the charges increase. Thus, we expect the lattice energy of CaO, which has 2+ and 2–ions, to be the greatest of the three. nalanda university is located in