LA PURISIMA CONCEPCION ACADEMY (Formerly Mataasnakahoy High School ) Committed to Faithful Service; Inspired by Love FOURTH QUARTER LEARNING PLAN 4.1 Understanding by Design (UBD) Plan in Science and Technology III ( Chemistry ) ____________________________________________________________________________ Topic: Chemical Accounting Subject Area: Chemistry Big Ideas: The Chemical Reactions Year Level: Third Year Allocated
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PR OCEDURE Before beginning‚ set up a data table similar to the Data Table: Experiment Results in the Lab Report Assistant section. This experiment will create a reaction of sodium carbonate and calcium chloride dihydrate to produce a precipitate of calcium carbonate. This formula is: Na2CO3(aq) + CaCl2. 2H2O(aq) à CaCO3(s) + 2NaCl(aq) + 2H2O 1. Put on your goggles. 2. Weigh out 1.0 g of CaCl2·2H2O and put it into the 100-mL beaker. Add 25 mL of distilled water and stir to form the calcium
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* 9/4/12 12.3 - crystal structures crystalline structure: possess rigid and long-range order; its atoms‚ molecules‚ or ions occupy specific positions (Exs. wax ‚ice‚ sugar‚ salt‚ diamond‚ etc.) unit cell: basic repeating structural unit of crystalline solid -there are seven types of unit cells coordination number: number of atoms surrounding an atom in a crystal lattice -higher coordination number --> more tightly packed structure 3 types of cubic unit cells: -primitive cubic (sc) c#:
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Materials Student Provides: Distilled Water 2 Clean Sheets of Paper 1 Paper Towel 1 Pair of Scissors LabPaq Provides: 1 Digital Scale 1 50 mL Plastic Graduated Cylinder 1 Pair of Safety Goggles 1 Spatula 6 Test Tubes‚ 13 x 100 mm in Bubble Bag 1 Test Tube Rack‚ 6 x 13 mm 1 Dual Magnifier 1 Rubber Stopper 1 Marking Pencil 1 Test Tube
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morphology was examined by observing both stained and unstained organisms. A wet mount is a preparation process where a live specimen in culture fluid is placed on a slide and the organism is free to move about. In the wet mount slides provided via LabPaq software with cheek‚ dental plaque‚ and yeast specimens were observed. The wet mount preparations were difficult to observe because of poor contrast‚ however‚ a common occurrence in the specimens were cells large in size and translucent in color
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Physical and chemical ProPerties Physical and Chemical Properties Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Substance Name Mg Cu Zn
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during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations. Experiment and Observation Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03‚ 2015) Table 1 Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 (Sodium Bicarbonate) HCl (Hydrochloric Acid) Bubbles‚ no change in color‚ clear‚ Y A2 NaOCl
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Name: Exp 9: Stoichiometry of a Precipitation Reaction Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =0.68 g Convert moles of Na-2CO3 to grams of Na2CO3 = 0.00680 moles Na-2CO3 x 105.99g Na-2CO3 1 mole Na-2CO3 = 0.72g 0.72g of Na-2CO3 to fully react with 1g of CaCl2-.2H2O Step 4: Mass of weighing dish
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PROPERTIES OF SOLUTIONS A solution is a mixture of materials‚ one of which is usually a fluid. A fluid is a material that flows‚ such as a liquid or a gas. The fluid of a solution is usually the solvent. The material other than the solvent is the solute. We say that we dissolve the solute into the solvent. Some solutions are so common to us that we give them a unique name. A solution of water and sugar is called syrup. A solution of sodium chloride (common table salt) in water is called brine
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References: ACID_BASE INDICATORS. (n.d.). ChemLib. Retrieved May 27‚ 2013‚ from http://www.ch.ic.ac.uk/vchemlib/course/indi/indicator.html LabPaq. A Laboratory Manual of Small-Scale Experiments for the Independent Study of General College Chemistry. (2013). Englewood: Hands-On Labs‚ Inc..
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