A chromium III bromide is an inorganic compound that contains chromium and bromine. The formula for this compound is CrBr3. This solid can be either orange or brown in color, depending on its purity. It is insoluble in water and has a Mohs hardness of 3.5.
Chromium III bromide is used in some pyrotechnic formulations, as a brominating agent for organic compounds, and as a photosensitive material in photoresists. It can also be used to make pigments for inks and paints.
The compound is made by treating chromium oxide with hydrobromic acid. This reaction produces hydrogen gas and chromium bromide:
Cr2O3 + 6HBr → 2CrBr3 + 3H2
Chromium III bromide can also be made by reacting chromium metal with bromine gas:
Cr + 3Br2 → 2CrBr3
This compound is typically found in the form of orange or brown crystals. It has a melting point of 1090 °C and a boiling point of 1670 °C. It is insoluble in water, but is soluble in dilute acids and bases.
The structure of chromium III bromide is similar to that of chromium chloride, with each chromium atom being surrounded by six bromine atoms in an octahedral arrangement. The bond between the chromium and bromine atoms is ionic in nature.
The physical and chemical properties of chromium III bromide make it a useful compound in a number of applications. For example, it is used in some pyrotechnic formulations as a brominating agent. It is also used as a photosensitive material in photoresists. In addition, chromium III bromide can be used to make pigments for inks and paints.
What is the chemical formula for chromium iii bromide?
Chromium III bromide is an inorganic compound with the chemical formula CrBr3. It is a dark brown solid that is insoluble in water. Chromium III bromide is used as a reagent in organic synthesis and as a catalyst in the production of polyethylene.
What is the molar mass of chromium iii bromide?
The molar mass of chromium III bromide is 234.47 grams per mole. This means that there are 234.47 grams of chromium III bromide in one mole, or 6.02 x 10^23 atoms of chromium III bromide. The molar mass is important in chemistry because it is used to calculate the amount of a substance that is needed in a reaction. For example, if you want to make a solution of chromium III bromide that is 0.1 molar, you would need 0.1 moles, or 23.45 grams, of chromium III bromide.
What is the density of chromium iii bromide?
Chromium iii bromide is a ionic compound with the formula CrBr3. It is a dark brown solid that is soluble in water.
The density of chromium iii bromide is 5.36 g/cm3.
What is the melting point of chromium iii bromide?
Chromium III bromide is a solid at room temperature and has a melting point of 1090 degrees Celsius. Chromium is a transition metal and bromide is a halide. Chromium III bromide has a trigonal bipyramidal structure. The melting point of a substance is the temperature at which the solid–liquid phase change occurs. The melting point of a substance is also known as the freezing point.
What is the boiling point of chromium iii bromide?
Chromium iii bromide is an inorganic compound with the chemical formula CrBr3. It is a dark brown solid that is soluble in water. It is used as a reagent in organic synthesis and as a chromium source in the production of high-purity bromine.
The boiling point of a substance is the temperature at which the liquid–gas phase change occurs. For chromium iii bromide, this occurs at 428.0°C. Chromium iii bromide has a molar mass of 273.82 g/mol and a melting point of 1291°C.
What is the solubility of chromium iii bromide in water?
Chromium III bromide is highly soluble in water. This is due to the strong attractive forces between the chromium cations and the bromide anions. These strong attractive forces result in a significant amount of energy being released when the two ions come together, which lowers the overall entropy of the system. This increase in entropy is favored by the increase in entropy of the surrounding water molecules, which results in the chromium III bromide being soluble in water.
What is the solubility of chromium iii bromide in ethanol?
Chromium(III) bromide, or CrBr3, is a chemical compound consisting of one chromium atom and three bromine atoms. CrBr3 is a dark brown solid that is insoluble in water, but it is soluble in some organic solvents such as ethanol.
The solubility of CrBr3 in ethanol is influenced by several factors, including the temperature of the solvent and the presence of other solutes. When the temperature is increased, the solubility of CrBr3 generally decreases. This is because the solvation forces between the CrBr3 molecules and the ethanol molecules are weaker at higher temperatures. The presence of other solutes can also decrease the solubility of CrBr3 in ethanol by competing for the limited number of solvent molecules.
The solubility of CrBr3 in ethanol can be measured by a variety of methods, including the use of a solvent extraction method or a simple gravimetric analysis. The most accurate results are typically obtained using the former method, which involves the separation of the CrBr3 molecules from the ethanol molecules by centrifugation.
The solubility of CrBr3 in ethanol can have important implications for the pharmaceutical and metal finishing industries. For example, CrBr3 is used as a catalytic agent in the manufacture of some pharmaceuticals. If the solubility of CrBr3 in ethanol is too low, the production of these pharmaceuticals will be less efficient. In the metal finishing industry, CrBr3 is used in some processes to coat metal surfaces with a layer of chromium. If the solubility of CrBr3 in the ethanol used for these processes is too low, the metal surfaces will not be evenly coated.
What is the structure of chromium iii bromide?
Chromium(III) bromide is an inorganic compound with the formula CrBr3. It is a dark green, crystalline solid.
The structure of chromium(III) bromide is cubic with the chromium atoms in the center and the bromine atoms at the corners. The Cr-Br bond length is 2.41 Å. The Cr-Br-Cr bond angles are 109.47°.
The compound is used in the production of pigments and dyes, as well as in photography. It is also used as a mild Lewis acid in organic synthesis.
How is chromium iii bromide prepared?
Chromium III bromide can be prepared in several ways. One method is to add bromine to a solution of chromium chloride, which forms chromium bromide and hydrochloric acid. The acid can be neutralized with a base, such as sodium hydroxide, and the chromium bromide can be isolated by precipitating it from the solution with a suitable solvent, such as ethanol.
Another method is to react chromium metal with bromine gas. This reaction produces chromium metal bromide and hydrogen gas. The chromium metal bromide can be isolated by evaporating the solvent, such as water.
Finally, chromium III bromide can be prepared by the reaction of chromium oxide with bromine gas. This reaction produces chromium bromide and oxygen gas. The chromium bromide can be isolated by precipitating it from the solution with a suitable solvent, such as ethanol.
Frequently Asked Questions
What is the ionic compound for chromium 3+?
The ionic compound for chromium 3+ is chromium (III) insoluble salts.
What is the molecular weight of ionic ion chromium (III)?
The molecular weight of ionic ion chromium (III) is 51.996 g/mol.
What is the molar mass of CR in grams?
The molar mass of CR in grams is 51.9961 g/mol.
How do you find the molar mass?
Our calculator below can help calculate the molar mass of a compound. Simply enter the molecule's name, weight in grams and the desired decimal point.
How do you name a chromium ionic compound with (III) *?
You would use the (III) * Roman numeral to name this chromium ionic compound. Cr3+
Sources
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- https://pubchem.ncbi.nlm.nih.gov/compound/Chromium_3_-tribromide
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