B - eko.olunet.org
... 3. In chemical experiments, the purity of the starting material and the composition of impurities/additives are of great importance. For his experiments, Thomas needed KBr with at least 95.0% purity. In order to determine the purity of an available inorganic compound, he weighed out 0.8230 g of KBr ...
... 3. In chemical experiments, the purity of the starting material and the composition of impurities/additives are of great importance. For his experiments, Thomas needed KBr with at least 95.0% purity. In order to determine the purity of an available inorganic compound, he weighed out 0.8230 g of KBr ...
Acrobat - chemmybear.com
... The N2 & O2 are causing (750-22) = 728 mmHg. Since 23 of the gas is O2 , PO2 = 23 (728) = 485 mmHg. B “does not conduct” eliminates the metal, Pt. “insoluble in water” eliminates ionic CsCl. The high MP eliminates the molecular substance, C10 H22 . They are describing a “covalent network solid.” A V ...
... The N2 & O2 are causing (750-22) = 728 mmHg. Since 23 of the gas is O2 , PO2 = 23 (728) = 485 mmHg. B “does not conduct” eliminates the metal, Pt. “insoluble in water” eliminates ionic CsCl. The high MP eliminates the molecular substance, C10 H22 . They are describing a “covalent network solid.” A V ...
Density functional theory and FTIR spectroscopic study of carboxyl
... as well as carboxylic acids R-COOH, where R varies from CH3 to CH3(CH2)4, respectively. Generally, the optimized carboxylic acids structures are Cs symmetry. The characteristic band C=O is compared with that of free carboxyl. As in Table 2, C=O of carboxyl group is at 1767.9 cm–1, the band is shifte ...
... as well as carboxylic acids R-COOH, where R varies from CH3 to CH3(CH2)4, respectively. Generally, the optimized carboxylic acids structures are Cs symmetry. The characteristic band C=O is compared with that of free carboxyl. As in Table 2, C=O of carboxyl group is at 1767.9 cm–1, the band is shifte ...
ism ismismismismismrapidrevisionquestionsismismismismismism
... der waal’s force of attraction. What type of alignment in crystals makes them ferromagnetic, antiferromagnetic and ferrimagnetic? (i) Ferromagnetism arises due to spontaneous alignment of magnetic moments of ions or atoms in the same direction. (ii) Antiferromagnetism arises due to alignment of magn ...
... der waal’s force of attraction. What type of alignment in crystals makes them ferromagnetic, antiferromagnetic and ferrimagnetic? (i) Ferromagnetism arises due to spontaneous alignment of magnetic moments of ions or atoms in the same direction. (ii) Antiferromagnetism arises due to alignment of magn ...
Ch 4 Student.pptx
... • Limiting Reactant – reactant that is completely consumed and limits amount of product • Reactant in excess – reactant present in greater quantity than limiting reactant • Theoretical Yield – amount of product made based on consumption of all the limiting reactant • Actual Yield – amount of pro ...
... • Limiting Reactant – reactant that is completely consumed and limits amount of product • Reactant in excess – reactant present in greater quantity than limiting reactant • Theoretical Yield – amount of product made based on consumption of all the limiting reactant • Actual Yield – amount of pro ...
2014_S4_CHM_NORMAL (ALL)
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
Here`s - Sonlight
... metal to become more than one possible ion. When we write out the name of the ionic compound involving a transition metal, 2 we need to be very clear about which ion is present. For example, tin chloride is an ambiguous name because the tin could have any number of charges. How do we keep the multip ...
... metal to become more than one possible ion. When we write out the name of the ionic compound involving a transition metal, 2 we need to be very clear about which ion is present. For example, tin chloride is an ambiguous name because the tin could have any number of charges. How do we keep the multip ...
Discussion Questions
... b. HCl from “concentrated” (12 M) reagent c. NiCl2 from the salt NiCl2 ? 6H2O d. HNO3 from “concentrated” (16 M) reagent e. Sodium carbonate from the pure solid 23. What mass of NaOH is contained in 250.0 mL of a 0.400 M sodium hydroxide solution? 24. If 10. g of AgNO3 is available, what ...
... b. HCl from “concentrated” (12 M) reagent c. NiCl2 from the salt NiCl2 ? 6H2O d. HNO3 from “concentrated” (16 M) reagent e. Sodium carbonate from the pure solid 23. What mass of NaOH is contained in 250.0 mL of a 0.400 M sodium hydroxide solution? 24. If 10. g of AgNO3 is available, what ...
Physical chemistry and transition elements 5.1 Rates, equilibrium
... The copper half cell would have been set up so that copper metal was in contact with its ions: a strip of copper would have been placed in a solution such as CuSO4(aq), at a concentration of 1 mol dm−3 and a temperature of 298 K. The copper metal would have been the electrode and would have been con ...
... The copper half cell would have been set up so that copper metal was in contact with its ions: a strip of copper would have been placed in a solution such as CuSO4(aq), at a concentration of 1 mol dm−3 and a temperature of 298 K. The copper metal would have been the electrode and would have been con ...
Non-native transition metal monoxide nanostructures
... Cobaltous oxide typically crystallizes in two crystal phases; c-CoO (space group Fm3m) with octahedral Co2+ ions and h-CoO (space group P63mc) with tetrahedral Co2+ ions. On the basis of its high chemical stability and intriguing catalytic properties, c-CoO has been widely studied for such potential ...
... Cobaltous oxide typically crystallizes in two crystal phases; c-CoO (space group Fm3m) with octahedral Co2+ ions and h-CoO (space group P63mc) with tetrahedral Co2+ ions. On the basis of its high chemical stability and intriguing catalytic properties, c-CoO has been widely studied for such potential ...
Liquid–liquid extraction
Liquid–liquid extraction (LLE) consists in transferring one (or more) solute(s) contained in a feed solution to another immiscible liquid (solvent). The solvent that is enriched in solute(s) is called extract. The feed solution that is depleted in solute(s) is called raffinate.Liquid–liquid extraction also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubilities in two different immiscible liquids, usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase. Liquid–liquid extraction is a basic technique in chemical laboratories, where it is performed using a variety of apparatus, from separatory funnels to countercurrent distribution equipment. This type of process is commonly performed after a chemical reaction as part of the work-up.The term partitioning is commonly used to refer to the underlying chemical and physical processes involved in liquid–liquid extraction, but on another reading may be fully synonymous with it. The term solvent extraction can also refer to the separation of a substance from a mixture by preferentially dissolving that substance in a suitable solvent. In that case, a soluble compound is separated from an insoluble compound or a complex matrix.Solvent extraction is used in nuclear reprocessing, ore processing, the production of fine organic compounds, the processing of perfumes, the production of vegetable oils and biodiesel, and other industries.Liquid–liquid extraction is possible in non-aqueous systems: In a system consisting of a molten metal in contact with molten salts, metals can be extracted from one phase to the other. This is related to a mercury electrode where a metal can be reduced, the metal will often then dissolve in the mercury to form an amalgam that modifies its electrochemistry greatly. For example, it is possible for sodium cations to be reduced at a mercury cathode to form sodium amalgam, while at an inert electrode (such as platinum) the sodium cations are not reduced. Instead, water is reduced to hydrogen. A detergent or fine solid can be used to stabilize an emulsion, or third phase.