Αποτελέσματα Αναζήτησης
Lecture 1. Lecturer Anas Tarik Nafei. Objectives: Upon completing this chapter you will be able to: Determine M.wt. of electrolyte from atomic or formula weight as well as valence and no. of ions upon dissociation. Calculate problems involving milliequivalents (used for electrolyte replacement)
16 Ιουλ 2023 · An electrolyte solution conducts electricity because of the movement of ions in the solution (see above). The larger the concentration of ions, the better the solutions conducts. Weak electrolytes, such as HgCl 2, conduct badly because they produce few ions when dissolved (low concentration of ions) and exist mainly in the form of molecules.
29 Ιουλ 2022 · Formation of Ions. In ordinary chemical reactions, the nucleus of each atom (and thus the element's identity) remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms.
12 Σεπ 2022 · Substances that dissolve in water to yield ions are called electrolytes. Electrolytes may be covalent compounds that chemically react with water to produce ions (for example, acids and bases), or they may be ionic compounds that dissociate to yield their constituent cations and anions, when dissolved.
Define ionic and molecular (covalent) compounds. Predict the type of compound formed from elements based on their location within the periodic table. Determine formulas for simple ionic compounds. In ordinary chemical reactions, the nucleus of each atom (and thus the identity of the element) remains unchanged.
H 2 O (l) + H 2 O (l) ⇌ H 3 O + (a q) + OH − (a q) In some cases, solutions prepared from covalent compounds conduct electricity because the solute molecules react chemically with the solvent to produce ions. For example, pure hydrogen chloride is a gas consisting of covalent HCl molecules. This gas contains no ions.
In this case we need 2 phosphate ions to combine with 3 magnesium ions to form magnesium phosphate. The cation in this case is written the same, however, parentheses are needed when expressing the 2 phosphate ions, as follows: Mg 3 (PO 4) 2
