FREE Master of Chemistry: Inorganic Chemistry Questions and Answers
The coordination number of Ni +2 in [Ni(NH2-CH2-CH2-NH2)3]+2 is.
In coordination complexes, the coordination number refers to the number of ligands that are directly bonded to the central metal ion. Each ligand in the complex forms a coordinate bond with the metal ion by donating a pair of electrons. In the given complex, [Ni(NH2-CH2-CH2-NH2)3]2+, the nickel (Ni^2+) ion is surrounded by three ligands, NH2-CH2-CH2-NH2 (ethylenediamine), which are bonded to the metal through nitrogen atoms. Since each ligand donates two electron pairs to the metal, the coordination number of Ni^2+ in this complex is six. Therefore, the coordination number of Ni^2+ in [Ni(NH2-CH2-CH2-NH2)3]2+ is Six.
With the exception of, all halogens can display various co-valences.
In chemistry, halogens are a group of elements that include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). These elements have seven valence electrons in their outermost energy level and can form compounds by sharing electrons with other elements through covalent bonding.
A method of separating mixture components based on differences in their affinities for mobile and stationary phases is referred to as
The process of separation of components of a mixture based on differences in their affinity for mobile and stationary phases is called Chromatography. It is a powerful and widely used analytical technique for separating and analyzing complex mixtures into individual components. Different types of chromatography methods, such as gas chromatography (GC), liquid chromatography (LC), and thin-layer chromatography (TLC), are employed depending on the specific application and the nature of the mixture being analyzed.
Choose the methods for separating colors, amino acids, and dyes.
Chromatography is a versatile separation method that exploits the differences in the affinities of various substances for a stationary phase and a mobile phase. It can be used to separate mixtures of compounds based on their different chemical properties, such as polarity, size, charge, or affinity for a particular adsorbent.
In reality, alpha rays are
Alpha particles, commonly referred to as alpha rays, are made up of two protons and two neutrons, which form a helium-4 nucleus. They are positively charged particles emitted during certain types of radioactive decay, such as alpha decay. Alpha particles have low penetrating power due to their relatively large size and positive charge. They can be easily stopped by a few centimeters of air, a sheet of paper, or even the outer layer of human skin. Their ionizing properties make them potentially harmful to living tissues if they are inhaled or ingested, but they can be shielded effectively with thin materials. In summary, alpha rays are helium nuclei (He^2+).
Which electrolyte is used for gold plating?
Gold plating is an electrochemical process where a thin layer of gold is deposited onto a conductive surface, often used to enhance the appearance and corrosion resistance of jewelry, electronics, and other items. In this process, a gold-containing electrolyte is used as the plating solution. The most widely used electrolyte for gold plating is the complex ion [Au(CN)2]^- dissolved in an alkaline solution containing potassium (K+). The cyanide ions (CN^-) in the complex help stabilize the gold ions in the solution and facilitate the deposition of gold onto the surface. Therefore, the correct choice for the electrolyte used in gold plating is [K(Au(CN)2].
One particle is released in the initial stage of the disintegration of uranium.
The alpha particle is relatively large and positively charged, and it travels at high speeds. As it moves away from the uranium nucleus, it may interact with surrounding matter and lose its energy. Alpha decay is an important process in the natural decay chain of uranium and plays a significant role in the release of energy and the formation of new elements.
A metal and a chemical are combined to generate a coordination complex.
In coordination chemistry, a metal ion acts as a central atom and forms coordinate bonds with ligands. Ligands are molecules or ions that have lone pairs of electrons and can donate these electron pairs to form coordinate covalent bonds with the metal ion. The coordination complex is stabilized by these coordinate bonds between the metal and ligands.
Na2[Sn(OH)6] is known by its IUPAC name.
The correct IUPAC name for Na2[Sn(OH)6] is sodium hexahydroxostannate(IV).
In this compound:
The cation is sodium (Na+), which is represented first in the name.
The anion is the complex ion [Sn(OH)6]2-, which is represented by the prefix "hexahydroxo-" indicating six hydroxide ligands surrounding the central tin (Sn) atom.
The Roman numeral (IV) in parentheses indicates the oxidation state of the tin ion, which is +4 (stannate(IV)).
Therefore, the IUPAC name for Na2[Sn(OH)6] is sodium hexahydroxostannate(IV).
At pH, the copper complex is generated in ppt.
At lower pH values, such as pH 3.0 to 3.3, the concentration of protons (H+) in the solution is high. These protons can compete with the copper ions for binding to ligands, leading to the formation of copper complexes. The copper complexes formed at this pH range tend to be less soluble and may precipitate out of the solution. On the other hand, at higher pH values, the concentration of hydroxide ions (OH-) increases, which can form copper hydroxide complexes and keep the copper in solution, reducing the likelihood of precipitation. Thus, in the specific pH range of 3.0 to 3.3, the copper complex is likely to be less soluble and may form a precipitate.
The substance is referred to as benzoin oxime.
The correct name for benzoin oxime is "Benzoin dioxime" or simply "Dioxime." It is an organic compound with the molecular formula C14H13NO2. The term "dioxime" indicates that there are two hydroximino groups (-N=O) attached to the benzoin molecule.The correct name for benzoin oxime is "Benzoin dioxime" or simply "Dioxime." It is an organic compound with the molecular formula C14H13NO2. The term "dioxime" indicates that there are two hydroximino groups (-N=O) attached to the benzoin molecule.
The energy difference between the t2g and eg sets is designated by in crystal field theory (CFT).
In crystal field theory (CFT), the energy gap between the t2g (triangular d-orbitals) and eg (eclipsed d-orbitals) sets is denoted by Δ (Delta) or 10Dq. In octahedral coordination complexes, the d-orbitals of the central metal ion split into two sets of different energy levels due to the electrostatic interactions with the surrounding ligands. The three lower-energy d-orbitals (dxy, dxz, dyz) form the t2g set, and the two higher-energy d-orbitals (dx2-y2, dz2) form the eg set.
Pick substances that can be converted into chelating agents.
Chelating agents are chemical compounds that have multiple donor atoms capable of forming coordination bonds with a metal ion. These donor atoms can bind to the metal ion simultaneously, creating a stable ring-like structure known as a chelate. Chelating agents are commonly used in various applications, such as metal ion extraction, water treatment, and as stabilizers in pharmaceuticals.
Select the force or forces at play in chromatography.
All of these forces are involved in chromatography and contribute to the retention and separation of analyte molecules during the chromatographic process. The specific interactions depend on the type of chromatography being used and the nature of the analyte and stationary phase.
Which of the following compounds is more likely to be ionic?
Ionic compounds are formed when atoms with significantly different electronegativities transfer electrons to form ions. Strontium bromide (SrBr2) is composed of strontium ions (Sr^2+) and bromide ions (Br^-) held together by ionic bonds.