C:\SUBJECTS\SUBJECTS\Chemistry
... E. Ion (T), copper (L), aluminium (TL). In the preparation of some pure crystals of Cu (NO3)2 starting with CuO, a student gave the following statements as steps he employed. Which of these shows a flaw in his report? A. Some CuO was reacted with excess dilute H2SO4 B. The solution was concentrated ...
... E. Ion (T), copper (L), aluminium (TL). In the preparation of some pure crystals of Cu (NO3)2 starting with CuO, a student gave the following statements as steps he employed. Which of these shows a flaw in his report? A. Some CuO was reacted with excess dilute H2SO4 B. The solution was concentrated ...
PAGE PROOFS
... What can send a shiver down your spine, bring tears to your eyes and make your mouth pucker? Simply the taste of a freshly cut lemon or unripe pineapple. The vinegar in salad dressing, though less stringent, has the same effect. Even a cola or a glass of sparkling wine may leave a slightly sour tast ...
... What can send a shiver down your spine, bring tears to your eyes and make your mouth pucker? Simply the taste of a freshly cut lemon or unripe pineapple. The vinegar in salad dressing, though less stringent, has the same effect. Even a cola or a glass of sparkling wine may leave a slightly sour tast ...
15.0 EquilibriumIHS2014
... equilibrium; i.e., closed system, constancy of properties, equal rates of forward and reverse ...
... equilibrium; i.e., closed system, constancy of properties, equal rates of forward and reverse ...
3.Redox
... 1. Solution = homogeneous mixture of two or more components. 2. Solvent = component present to largest extent. Phase of solution is same as the phase of the solvent. a. In some cases the solvent is not a pure substance . Mixed solvents are used in many reactions . b. In a few cases a minor component ...
... 1. Solution = homogeneous mixture of two or more components. 2. Solvent = component present to largest extent. Phase of solution is same as the phase of the solvent. a. In some cases the solvent is not a pure substance . Mixed solvents are used in many reactions . b. In a few cases a minor component ...
5 SURFACE CHEMISTRY CATEGORY
... freezing point by 7.5°C? The freezing point depression constant, Kf , for water is 1.86 K kg mol–1. Assume van’t Hoff factor for NaCl is 1.87. 8. 18 g of glucose, C6H12O6 (Molar Mass = 180 g mol–1) is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil? 9.Determine ...
... freezing point by 7.5°C? The freezing point depression constant, Kf , for water is 1.86 K kg mol–1. Assume van’t Hoff factor for NaCl is 1.87. 8. 18 g of glucose, C6H12O6 (Molar Mass = 180 g mol–1) is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil? 9.Determine ...
Problem Authors - PianetaChimica
... The acids which are stronger than pure sulfuric acid are called superacids. Superacids are very strong proton donors being capable of protonating even weak Lewis acids such as Xe, H2, Cl 2, Br2, and CO2. Cations, which never exist in other media, have been observed in superacid solutions. George Ola ...
... The acids which are stronger than pure sulfuric acid are called superacids. Superacids are very strong proton donors being capable of protonating even weak Lewis acids such as Xe, H2, Cl 2, Br2, and CO2. Cations, which never exist in other media, have been observed in superacid solutions. George Ola ...
Chlorine
... compartment, leaving at a lower concentration . Sodium ( or potassium ) hydroxide solution is circulated through the cathode compartment, exiting at a higher concentration. A portion of the concentrated sodium hydroxide solution leaving the cell is diverted as product, while the remainder is diluted ...
... compartment, leaving at a lower concentration . Sodium ( or potassium ) hydroxide solution is circulated through the cathode compartment, exiting at a higher concentration. A portion of the concentrated sodium hydroxide solution leaving the cell is diverted as product, while the remainder is diluted ...
Syllabus - Chemistry
... saturated C-H group.(activated and unactivated). Alcohols, aldehydes, ketones, carboxylic acids, amines. Oxidation with lead tetracetate, Chromic acid, Selenium dioxide, ruthenium tetraoxide, iodobenzene diacetate and thaluim (III) nitrate. Reduction:lntroduction- Different reductive processes. Hydr ...
... saturated C-H group.(activated and unactivated). Alcohols, aldehydes, ketones, carboxylic acids, amines. Oxidation with lead tetracetate, Chromic acid, Selenium dioxide, ruthenium tetraoxide, iodobenzene diacetate and thaluim (III) nitrate. Reduction:lntroduction- Different reductive processes. Hydr ...
1.24 calculations and chemical reactions
... 4.1) An acid, H2A, reacts with sodium hydroxide as shown in the equation below. 2Na+(aq) + A2– (aq) + 2H2O(l) H2A(aq) + 2NaOH(aq) A solution of this acid was prepared by dissolving 2.02 g of H2A in water and making the volume up to 250 cm3 in a volumetric flask. A 25.0 cm3 sample of this solution re ...
... 4.1) An acid, H2A, reacts with sodium hydroxide as shown in the equation below. 2Na+(aq) + A2– (aq) + 2H2O(l) H2A(aq) + 2NaOH(aq) A solution of this acid was prepared by dissolving 2.02 g of H2A in water and making the volume up to 250 cm3 in a volumetric flask. A 25.0 cm3 sample of this solution re ...
2(g)
... Excess and limiting reagents refer to the reactant that will run out first and stop more product from forming. ...
... Excess and limiting reagents refer to the reactant that will run out first and stop more product from forming. ...
Active Learning Questions
... c. If the hydroxide ion concentration in a solution is 0.10 M, what is the pH at 40.C? 47. Calculate the pH and pOH of the solutions in Exercises 43 and 44. 48. Calculate [H] and [OH] for each solution at 25C. Identify each solution as neutral, acidic, or basic. a. pH 7.40 (the normal pH of bl ...
... c. If the hydroxide ion concentration in a solution is 0.10 M, what is the pH at 40.C? 47. Calculate the pH and pOH of the solutions in Exercises 43 and 44. 48. Calculate [H] and [OH] for each solution at 25C. Identify each solution as neutral, acidic, or basic. a. pH 7.40 (the normal pH of bl ...
Exam 2 Key
... So, we have 0.0424 mol gas with a mass of 1.27 g, giving a molar mass of: 1.27 g = 29.95 g/mol 0.0424 mol The molar mass of NO = 30.0 g/mol and the molar mass of N2O = 44.0 g/mol. Therefore, the gas must be NO. (note there are many other ways to go about this, all of which involve determining the nu ...
... So, we have 0.0424 mol gas with a mass of 1.27 g, giving a molar mass of: 1.27 g = 29.95 g/mol 0.0424 mol The molar mass of NO = 30.0 g/mol and the molar mass of N2O = 44.0 g/mol. Therefore, the gas must be NO. (note there are many other ways to go about this, all of which involve determining the nu ...
2nd Nine Weeks Notes
... a. A plot of 1/[A] vs. t will produce a straight line with a slope equal to k. b. [A] depends on time and can be used to calculate [A] at any time t, provided k and [A]o are known. 4. Half-Life. * Equation: ...
... a. A plot of 1/[A] vs. t will produce a straight line with a slope equal to k. b. [A] depends on time and can be used to calculate [A] at any time t, provided k and [A]o are known. 4. Half-Life. * Equation: ...
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.