of a Mixture of sand and copper salt • In a test tube stir 2 g of sand copper and 5ml of water. • In a hot plate heat up the beaker with the supernatant until water is evaporated. Separation of a Mixture of sand‚ calcium‚ and copper • In a beaker add 3g of sand‚ calcium‚ copper and deionized water and stir until copper dissolves. • Put a filter paper into a funnel‚ then pour the mixture into the filtering apparatus letting it drop into a beaker. • Transfer the solid from the filter paper
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(a mixture of aluminosilicates) and heating the mixture to about 1500oC. The chemical reaction releases carbondioxide and partially melts the components to form solid lumps called clinker. The clinker is ground to powder‚ and a small quantity of calcium sulfate is mixed in. This mixture is known as Portland Cement. Chemically‚ its main components are 26% dicalcium silicates ( Ca2SiO4); 51% tricalcium silicates (Ca3SiO5); and 11% tricalcium aluminate (Ca3Al2O6). When water is added‚ a number of complex
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Appearance: off-white to pale green crystals Melting point: 215 - 219 C Boiling point: 340 C Specific gravity: 1.25 Vapour pressure: Flash point: 121 C (closed cup) Explosion limits: 0.6% (lower) Autoignition temperature: anhydrous calcium chloride CAS #10043-52-4 Appearance: white beads or powder Melting point: 782 C Boiling point: Vapour density: Vapour pressure: negligible Specific gravity: 2.15 Flash point: Explosion limits: Autoignition temperature: anhydrous
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tube 1 Then 1m L of a saturated aqueous solution of sodium bicarbonate was added to the tube The contents were mixed forcefully by using a Pasteur pipette and expelling forcefully This was done for about three minutes; the layers were then allowed to separate The lower layer was placed in tube 2 and another 0.15mL of sodium bicarbonate was added The lower layer was then again added to tube 2‚ 1.0 mL of 3 M aqueous sodium hydroxide was added to tube 1 The
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FLEXURAL BEHAVIOUR OF POTASSIUM BASED GEOPOLYMER CONCRETE. D.Vasuki1‚ A.Kalaivani2 1PG Student‚ Department of Civil Engineering – Paavai Engineering College. 2Assistant. Professor‚ Department of Civil Engineering – Paavai Engineering College. ABSTRACT The global usage of cement occupies the second position next to water. As the development of country and infrastructure‚ their materials needed get increased. Meanwhile for the development of the infrastructure concrete plays the
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Half-equations: 2H2O (l) O2 (g) + 4H+ (aq) + 4e− 2H2O (l) + 2e− H2 (g) + 2OH− (aq) Overall reaction: 2H2O (l) 2H2 (g) + O2 (g) Production of SODIUM HYDROXIDE: Mercury Cell: Electrolytic half-equations: ANODE (titanium): 2Cl− (aq) Cl2 (g) + 2e− CATHODE (mercury) : Na+ (aq) + e− Na (Hg) Hydrolysis of sodium: sodium + water sodium hydroxide + hydrogen 2Na (s) + 2H2O (l) 2NaOH (aq) + H2 (g)
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Lab #16: Gravimetric Analysis of Metal Carbonate Introduction: In this laboratory the identity of group 1 metal Carbonate is determined gravimetrically using a double replacement precipitation reaction. Concepts: Double-Replacement reaction Gravimetric analysis. Background: The identity of group 1 metal M is determined by analyzing an unknown Group 1 metal carbonate‚ M2CO3. There are 3 main reactions in this lab: 1. Equation 1: M2CO3 (s) → 2M+ (aq) + CO32- (aq) 2. Equation 2: Ca2+
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IGSCE Chemistry Notes Oxides Oxides are used to determine whether an element is a metal or a non-metal. Most non-metals are classed as acidic oxides. While most metals are classed as basicoxides. Acidic Oxides * Reacts with water to form acids * Neutralises alkaline solution to form salt + water Basic Oxides * Neutralises acidic solutions to form salt + water Amphoeteric Oxides * These are non-metals which display both acidic and basic properties Alkaline Oxides * Reacts
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AQA GCSE Chemistry Unit 1 C 1: Fundamental ideas: C 1.1. Atoms‚ elements and compounds: * All substances are made up of atoms. * Elements contain only one atom. * Compounds contain more than one atom. * An atom has a tiny nucleus in its centre‚ surrounded by electrons. C 1.2. Atomic structure: * Atoms are made up of protons‚ neutrons and electrons. * Protons and electrons have equal and opposite electrical charges. Protons are positively charged‚ and electrons are negatively
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hydrogen chloride‚ hydrogen sulphide‚ ethyne] (i) This gas is used as a reducing agent in reducing copper oxide to copper. (ii) This gas produces dense white fumes with ammonia gas. (iii) This gas is used for welding purposes. (iv) This gas is also a saturated hydrocarbon. (v) This gas has a characteristic rotten egg smell. [5] (b) Choose the most appropriate answer for each of the following: (i) Among the elements given below‚ the element with the least electronegativity is: (A) Lithium (B) Carbon (C)
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