18. In a sample of solid calcium phosphate Ca3(PO4)2‚ the ratio of calcium ions to phosphate ions is - 3:2 19. What is the total number of atoms in (NH4)2SO4? - 15 20. What is the total number of oxygen atoms present in one unit of Mg(ClO3)2? - 6 21. What is the total number of atoms of oxygen in the formula Al(ClO3)3.6H2O? - 15 22. Write the correct formulas for the following binary ionic compounds. Compounds | Formulas | Lithium fluoride | LiF | Calcium oxide | CaO | Aluminum nitride
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sentence. PbCl2 (aq) + Na2CrO4 (aq) → PbCrO4 ↓ + 2NaCl (aq) Aqueous solutions of lead (II) chloride and sodium chromate react to yield solid lead (II) chromate and aqueous sodium chloride. 3. Write the chemical equations for the following reactions. a. When heated‚ solid calcium reacts with solid sulfur to produce solid calcium sulfide. Δ Ca (s) + S (s) → CaS (s) b. Hydrogen gas reacts with fluorine gas to produce hydrogen fluoride
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CH 125 INORGANIC CHEMISTRY FOR MICROBIOLOGY Laboratory Manual 2013 Edition By Brian Clark‚ Marco Castillo & Patrick Chan CENTENNIAL COLLEGE OF APPLIED ARTS & TECHNOLOGY‚ SCARBOROUGH‚ ONTARIO Preliminary Laboratory Information - CH 125 The following safety information is provided to the student in order to ensure that all students and college staff working in the laboratory are aware of common industrial laboratory safety practices. Laboratory
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Lab 1: Flame Test 11 Chemistry‚ university Preparation Conducted: September 20th‚ 2010 Purpose: To observe‚ and create a chart of the colours produced when solutions of known metal compounds are heated to high temperature. Question: What colours are produced when different metallic compounds are placed in a flame‚ and why this happens? Hypothesis/Prediction: Different salts will produce different colours when placed in a flame‚ due to the fact that each element has a different
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carbonate. c. Calcium metal reacts with water to form calcium hydroxide and hydrogen gas. d. Potassium nitrate decomposes to form potassium nitrite and oxygen. e. Barium metal reacts with Iron (III) sulfate to produce barium sulfate and iron metal. f. Barium chloride reacts with sodium sulfate to produce barium sulfate and sodium chloride. g. Bismuth (III) oxide and zinc metal react to produce zinc (II) oxide and bismuth metal. h. Calcium metal reacts with phosphorus to produce calcium phosphide
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are of an element before it. The coefficient in a chemical formula indicates how many molecules of the formula unit‚ or chemical compound. The chemical formulas we use in this experiment are NaCl (sodium chloride/salt)‚ KCl (potassium chloride)‚ and CsCl (cesium chloride) and CaCl2 (calcium chloride). To form
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are found on page 162 in the textbook Sciencepower 9 Part 7: Test tube; Test tube rack; Dilute hydrochloric acid; Magnesium ribbon Part 8: 3 Test tubes; Test tube rack; 2 Spatulas; 2 Stoppers; De-ionized water; ………………Ammonium chloride; Calcium Chloride Procedure: Part 1: i) Observe and record the physical properties of each starting substance …………………..before mixing the substances together. …………… ii) Pour 2-3mL of potassium iodide solution into a clean dry test tube. ………………iii)
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1. (a)Correct the following statements. (i) The melting points of crystalline and amorphous solids are not definite. The melting point of an amorphous solid is not definite. OR The melting point of a crystalline solid is definite. P Ps X solute . Ps P Ps The equation for relative lowering of vapour pressure when solute remains normal is X solute P (iii)The degree of ionization decreases with dilution. The degree of ionisation increases with dilution. (iv) Tertiary butyl halide
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antiperspirant 6 Ammonium bromide NH4Br Used in photography 7 Ammonium chloride NH4CI Used in photography 8 Ammonium carbonate (NH4)2CO3 Smelling salts 9 Calcium carbonate CaCO3 Limestone/chalk 10 Sodium chloride NaCI Table salt 11 Calcium chloride CacI2 De-icer for snow on roads 12 Calcium hypochlorite Ca(ClO)2 Swimming pool disinfectant 13 Ammonium Nitrate NH4NO3 Used in fertilizer 14 Ammonium phosphate (NH4)3PO4 Used in fertilizer 15 Calcium oxide CaO Used to make plaster 16 Carbon dioxide CO2 Dry ice
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hydrolyze the enzyme Urease efficiently to produce microbial concrete. Such bacterial are known to produce calcium which is useful in giving strength to cement. We are working in 2 stages. Stage 1: Here we check the effect of bacterial solution on cement mortar and along with that we check the effectiveness of the bacterial solution to fill the cracks in concrete by precipitation of calcium in the cracks. Stage 2: To prepare concrete using the cement and solution (bacterial) in optimum ratio
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