Naphtyl-imidazo-anthraquinones as novel colorimetric
... renewal of interest over the past ten years in the 9,10-anthraquinone signalling unit due to its chemosensor ability for several cations such as copper, cobalt and nickel ions [4]. Imidazole derivatives can be used for several optical applications in materials and medicinal chemistry due to the vers ...
... renewal of interest over the past ten years in the 9,10-anthraquinone signalling unit due to its chemosensor ability for several cations such as copper, cobalt and nickel ions [4]. Imidazole derivatives can be used for several optical applications in materials and medicinal chemistry due to the vers ...
Experimental skills and abilities
... 1 The evaporation process should be done very slowly. This is because sugar can easily char as it solidifies around the sides of the evaporating basin during the evaporating process. Also the crystallisation will require a lot longer for crystals to form from the concentrated solution and may need ...
... 1 The evaporation process should be done very slowly. This is because sugar can easily char as it solidifies around the sides of the evaporating basin during the evaporating process. Also the crystallisation will require a lot longer for crystals to form from the concentrated solution and may need ...
REVIEW and answers
... What kind of intermolecular force is involved in Au ? Why does this force occur ? What physical properties result from this force ? Au is a metal, so metallic bonding occurs between atoms of gold. Metallic bonding is based on the existence of loosely held outer electrons which become delocalized; th ...
... What kind of intermolecular force is involved in Au ? Why does this force occur ? What physical properties result from this force ? Au is a metal, so metallic bonding occurs between atoms of gold. Metallic bonding is based on the existence of loosely held outer electrons which become delocalized; th ...
Unit 4 - Calculations and Chemical Reactions
... Steps for Writing Formula Equation, Ionic Equation and Net Ionic Equation 1. Write the names, then and formulas of reactants (unit 3 naming). 2. Exchange cations and write the names, then formulas of products (unit 3 naming). 3. Write a chemical equation to showing the formulas of reactants and prod ...
... Steps for Writing Formula Equation, Ionic Equation and Net Ionic Equation 1. Write the names, then and formulas of reactants (unit 3 naming). 2. Exchange cations and write the names, then formulas of products (unit 3 naming). 3. Write a chemical equation to showing the formulas of reactants and prod ...
Relating Solubility and Ksp
... Ksp (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. The value of the constant identifies the degree of which the compound can dissociate in water. For example the higher the Ksp the more soluble the compound is. Ksp is defined in terms of activ ...
... Ksp (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. The value of the constant identifies the degree of which the compound can dissociate in water. For example the higher the Ksp the more soluble the compound is. Ksp is defined in terms of activ ...
Chapter 4
... The outward appearance of an aqueous solution does not tell us what is present at the microscopic level, that is, whether the solute particles are ions, molecules, or a mixture of the two. Nevertheless, some of the earliest insights into the microscopic nature of aqueous solutions came through macro ...
... The outward appearance of an aqueous solution does not tell us what is present at the microscopic level, that is, whether the solute particles are ions, molecules, or a mixture of the two. Nevertheless, some of the earliest insights into the microscopic nature of aqueous solutions came through macro ...
Chapter 3: Ionic and Covalent Compounds Chapter 3: Ionic and
... 4. _____ are negatively charged ions that have _____ electrons than protons. A) Anions, more B) Cations, more C) Anions, less D) Cations, less Ans: A Difficulty: Medium 5. Which statement concerning the ion Li+ is correct? A) Li+ has two total electrons. B) Li+ has an octet of electrons in its valen ...
... 4. _____ are negatively charged ions that have _____ electrons than protons. A) Anions, more B) Cations, more C) Anions, less D) Cations, less Ans: A Difficulty: Medium 5. Which statement concerning the ion Li+ is correct? A) Li+ has two total electrons. B) Li+ has an octet of electrons in its valen ...
Study guide for final
... 14) Conversion factors are constructed from any two quantities known to be equivalent. 15) Liquid and gas molecules can easily be compressed, while in a solid the molecules are incompressible. 16) A chemical change occurs when matter does not change its composition. 17) When a cold ice cube is dropp ...
... 14) Conversion factors are constructed from any two quantities known to be equivalent. 15) Liquid and gas molecules can easily be compressed, while in a solid the molecules are incompressible. 16) A chemical change occurs when matter does not change its composition. 17) When a cold ice cube is dropp ...
Module-2-s-and-d-elements - Львівський національний медичний
... sometimes considered a separate class. When the elements are arranged in the order of their atomic numbers (a number proportional to the net positive charge on the nucleus of an element atom), elements of similar physical and chemical properties occur at specific intervals. These groups of elements ...
... sometimes considered a separate class. When the elements are arranged in the order of their atomic numbers (a number proportional to the net positive charge on the nucleus of an element atom), elements of similar physical and chemical properties occur at specific intervals. These groups of elements ...
Holt Modern Chemistry Workbook
... The Octet Rule As the diagram at the right shows, the overlapping orbital in a hydrogen molecule contains two electrons. This is the same electron configuration as in a helium atom, which is a stable noble gas. Each hydrogen atom in the molecule is said to have a noble-gas configuration, since its o ...
... The Octet Rule As the diagram at the right shows, the overlapping orbital in a hydrogen molecule contains two electrons. This is the same electron configuration as in a helium atom, which is a stable noble gas. Each hydrogen atom in the molecule is said to have a noble-gas configuration, since its o ...
TOPIC 11 Further equilibrium 11.1 Chemical equilibrium
... Acidic. NH4NO3 is a salt of a strong acid (HNO3) and a weak base (NH3). Alkaline. CH3CH2COOK is a salt of a weak acid (CH3CH2COOH) and a strong base (KOH). Neutral. NaNO3 is a salt of a strong acid (HNO3) and a strong base (NaOH). ...
... Acidic. NH4NO3 is a salt of a strong acid (HNO3) and a weak base (NH3). Alkaline. CH3CH2COOK is a salt of a weak acid (CH3CH2COOH) and a strong base (KOH). Neutral. NaNO3 is a salt of a strong acid (HNO3) and a strong base (NaOH). ...
Ordinary Level - State Examination Commission
... Sketch the piece of glassware used to add the hydrochloric acid solution to the conical flask. During the titration what should have been done with the conical flask as the ...
... Sketch the piece of glassware used to add the hydrochloric acid solution to the conical flask. During the titration what should have been done with the conical flask as the ...
Chapter 9: Non-aqueous media
... The relative permittivity of NH3 is considerably less than that of H2 O and, as a consequence, the ability of liquid NH3 to dissolve ionic compounds is generally less than that of water. Exceptions include ½NH4 þ salts, iodides and nitrates which are usually readily soluble. For example, AgI, which ...
... The relative permittivity of NH3 is considerably less than that of H2 O and, as a consequence, the ability of liquid NH3 to dissolve ionic compounds is generally less than that of water. Exceptions include ½NH4 þ salts, iodides and nitrates which are usually readily soluble. For example, AgI, which ...
Coordination properties of the diethyl 2-quinolilmethylphosphonate ligand with chloride
... remains almost at the same position as in the free ligand, indicating monodentate coordination of 2-qmpe. In fact, X-ray structural determination [25] of trans-[Pd(2qmpe)2Cl2] confirmed that the metal ion is bound in a N-monodentate way to the pyridine. Other ligand bands characteristic of the phosp ...
... remains almost at the same position as in the free ligand, indicating monodentate coordination of 2-qmpe. In fact, X-ray structural determination [25] of trans-[Pd(2qmpe)2Cl2] confirmed that the metal ion is bound in a N-monodentate way to the pyridine. Other ligand bands characteristic of the phosp ...
Chem 11 Review Answers - hrsbstaff.ednet.ns.ca
... 23. Compared to the stability of the original atom, the stability of its ion that resembles a noble gas configuration would be __. a) identical b) sometimes less c) less d) greater 24. Which of the following does NOT affect the ionization energy of an electron? a) the distance of the electron from t ...
... 23. Compared to the stability of the original atom, the stability of its ion that resembles a noble gas configuration would be __. a) identical b) sometimes less c) less d) greater 24. Which of the following does NOT affect the ionization energy of an electron? a) the distance of the electron from t ...
Effect of N-donor ancillary ligands on structural and magnetic
... interactions between metal atoms and organic ligand moieties.2 Oxalate ions have been proven to be good connectors to bind to metal joints and play a key role in the design of new functional coordination networks. They have presented highly versatile binding modes (Scheme 1) and also serve as good h ...
... interactions between metal atoms and organic ligand moieties.2 Oxalate ions have been proven to be good connectors to bind to metal joints and play a key role in the design of new functional coordination networks. They have presented highly versatile binding modes (Scheme 1) and also serve as good h ...
The d-Block Elements
... Answer: Because the lightest element in the group is most likely to form stable compounds in lower oxidation states, the bromide will be CoBr 2. We predict that CoBr2 will be an ionic solid with a relatively high melting point and that it will dissolve in water to give the Co2+(aq) ion. ...
... Answer: Because the lightest element in the group is most likely to form stable compounds in lower oxidation states, the bromide will be CoBr 2. We predict that CoBr2 will be an ionic solid with a relatively high melting point and that it will dissolve in water to give the Co2+(aq) ion. ...
chemistry-subject test5 w. solutions
... The following Subject Test and explanations contains questions not in test format and should be used to practice and to assess your mastery of the foundation content necessary for success on the MCAT. Simply memorizing facts is not sufficient to achieve high scores; however, an incomplete understand ...
... The following Subject Test and explanations contains questions not in test format and should be used to practice and to assess your mastery of the foundation content necessary for success on the MCAT. Simply memorizing facts is not sufficient to achieve high scores; however, an incomplete understand ...
James W. Whittaker - Oxygen reactions of the copper oxidases
... product of the reaction. The reactivity of Cu towards O2 depends on the nuclearity, or number of metal ions, which determines the total number of electrons a complex can deliver, as well as the redox potential of the metal complex. The importance of nuclearity is illustrated by the binuclear Cu(I)–C ...
... product of the reaction. The reactivity of Cu towards O2 depends on the nuclearity, or number of metal ions, which determines the total number of electrons a complex can deliver, as well as the redox potential of the metal complex. The importance of nuclearity is illustrated by the binuclear Cu(I)–C ...
the importance of electron transfer mechanism in
... One interesting property of the first row transition metal atoms is the presence of low-lying electronic states that results from the near degeneracy of 4s and 3d orbitals. This situation provides unique opportunity to study roles of electronic energies and configuration on reactivities. Very recent ...
... One interesting property of the first row transition metal atoms is the presence of low-lying electronic states that results from the near degeneracy of 4s and 3d orbitals. This situation provides unique opportunity to study roles of electronic energies and configuration on reactivities. Very recent ...
- Catalyst
... Precipitation Reactions: Will a Precipitate form? Example: If a solution containing potassium chloride is added to a solution containing ammonium nitrate, will a precipitate form? KCl(aq) + NH4NO3(aq) → K+(aq) + Cl-(aq) + NH4+(aq) + NO3-(aq) Possible reaction products are KCl and NH4NO3, or NH4Cl a ...
... Precipitation Reactions: Will a Precipitate form? Example: If a solution containing potassium chloride is added to a solution containing ammonium nitrate, will a precipitate form? KCl(aq) + NH4NO3(aq) → K+(aq) + Cl-(aq) + NH4+(aq) + NO3-(aq) Possible reaction products are KCl and NH4NO3, or NH4Cl a ...
containing complexes of aromatic amino acids
... the 65Cu-containing complexes were used for verification). The CID of [CuII(Trp)2] 2+ (Fig. 1a) reveals only products of dissociative electron transfer, giving Trp + at m/z 204 and [CuI(Trp)]+ at m/z 267. The product ion at m/z 130 is probably the protonated 3-methyleneindolenine cation formed via ...
... the 65Cu-containing complexes were used for verification). The CID of [CuII(Trp)2] 2+ (Fig. 1a) reveals only products of dissociative electron transfer, giving Trp + at m/z 204 and [CuI(Trp)]+ at m/z 267. The product ion at m/z 130 is probably the protonated 3-methyleneindolenine cation formed via ...
Positron annihilation spectra and core
... number of these is determined by the number of nodes in the electron’s radial wave function, n − `: each lobe of non-zero wavefunction density at small (large) radii manifests in large (small) momentum density, and thus in large (small) energy regions of the spectra [49]. Overall, the total γ-spectr ...
... number of these is determined by the number of nodes in the electron’s radial wave function, n − `: each lobe of non-zero wavefunction density at small (large) radii manifests in large (small) momentum density, and thus in large (small) energy regions of the spectra [49]. Overall, the total γ-spectr ...
Acids, Bases, and pH
... Notice that the two acids shown in Fig. 4 both contain the same concentration of acid, that is the same number of acid molecules were added per unit volume of solution (in this case 6 HCl or 6 HF molecules were added). Also notice that the strong acid contains a higher concentration of H+, 6 H+ ion ...
... Notice that the two acids shown in Fig. 4 both contain the same concentration of acid, that is the same number of acid molecules were added per unit volume of solution (in this case 6 HCl or 6 HF molecules were added). Also notice that the strong acid contains a higher concentration of H+, 6 H+ ion ...
Chemical-Principles-7th-Edition-Zumdahl-Test-Bank
... A) the ratio of the masses of the elements in a compound is always the same. B) it is not possible for the same two elements to form more than one compound. C) if the same two elements form two different compounds, they do so in the same ratio. D) the total mass after a chemical change is the same a ...
... A) the ratio of the masses of the elements in a compound is always the same. B) it is not possible for the same two elements to form more than one compound. C) if the same two elements form two different compounds, they do so in the same ratio. D) the total mass after a chemical change is the same a ...