AS TRANSITION COURSE SUMMER 2012 PART 1: MEASURING AMOUNT OF SUBSTANCE MASS VOLUME MOLAR MASS AVOGADRO [pic] CONCENTRATION ATOM ION MOLECULE COURSE OUTLINE OCR Chemistry A Unit 1 – Autumn Term 2012 • Atoms and Electron Structure • Moles‚ Equations and Acids • Structure and Bonding • Redox‚ Group 2 and Group 7 Unit 1 Exam – January 2013 – 1 hour – 90 UMS – 30% of total Unit 2 – Spring Term 2013 • Basic Concepts
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flame color. I then repeated these steps for the other 7 solutions. Observations Metallic Ion Flame Color NaNO3 Sodium Na+ Yellow Sr(NO3)2 Strontium Sr2+ Red KNO3 Potassium K+ Violet Ba(NO3)2 Barium Ba2+ Yellow-Green Cu(NO3)2 Copper Cu2+ Blue-Green LiNO3 Lithium Li+ Deep
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Assessment: Answer the following item with the appropriate response. 1. What is a mole ratio? 2. What piece of information is needed to convert grams of a compound to moles of the same compound? 3. Phosphine (PH3) can be prepared by the hydrolysis of calcium phosphide‚ Ca3P2: Ca3P2 + 6 H2O 3 Ca (OH)2 + 2 PH3 a) One mole of Ca3P2 produces 2 mol of PH3. b) One gram of Ca3P2 produces 2 g of PH3. c) 3 moles of Ca(OH)2 are produced for each 2 mol of PH3 produced
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Mixing of two solutions. 55 Class IX EXPERIMENT No: 9 AIM: To study the external features of root‚ stem‚ leaf and flower of monocot and dicot plants. Material Required : Plants of Hibiscus/Peturnia/rose/pea and grass/maize/bamboo/lily or‚ any other ornamental herb with flower and fruits‚ simple or dissecting microscope‚ hand lens‚ slide‚ coverslip and razor /blade. Procedure : 1. 2. 3. Observe the differences in the external features of stem‚ leaf‚ root‚ flowers and seeds. To study the leaf‚ see
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and NaOCI A greenish color F NaOCI and KI A bright red G KI and Pb(NO3)2 A yellow H NaOH and phenolphthalein A light yellow I HCI and phenolphthalein A red color J NaOH and AgNO3 A black color K AgNO3 and NH3 No change L NH3 and CuSO4 A light whitish blue Observations: Data Table 2: What you observed during procedures Well #/ Question Chemicals Reaction A NaHCO3 and HCI - C02 Bubbles were formed B HCI and BTB The liquid turned an orange color C
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Elena Chen CH 221-227 November 3rd‚ 2009 Lab Report #3: Copper Cycle Abstract: The purpose of the experiment is to cycle solid copper through a series of five reactions. At different stages of the cycle‚ copper was present in different forms. First reaction involves reaction between the copper and nitric acid‚ and copper changed from elemental state to an aqueous. The second reaction converted the aqueous Cu2+ into the solid copper (2) hydroxide. In the third reaction Cu(OH)2 decomposed into
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Test #2 ANSWERS CHM 101 Part I Multiple Choice (2 points each) 1. Which element is most likely to form three covalent bonds? A) C B) Si C) P D) S E) Se 2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________. A) double; covalent B) double; ionic C) single; covalent D) single; ionic E) triple; covalent 3. Which property could describe a covalent compound? A) It conducts electricity when melted. B) Has a low boiling
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drops of NaOH and two drops of AgNO3. C2) Two drops of AgNO3 and two drops of NH4OH. This mixture was then absorbed into the corner of a paper towel and held in direct sunlight for approximately 5 minutes. D2) Two drops of NH4OH and two drops of CuSO4. 4. Each of the three
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AP Chemistry 12/13/11 Round-Trip Copper Reactions Lab The purpose of this lab was to evaluate our skills of decanting a supernatant liquid without losing the solid and successful completion of a series of reactions. This was done through five chemical reactions involving copper. In this lab‚ elemental copper was put through five different chemical reactions in order to convert it into different compounds. By the end of the fifth reaction‚ the copper was back to its elemental state. In the
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1. Place a small scoop of NaHCO3 in a test tube 2. Add 5 mL of HC2H3O2 to the same test tube 3. Record Observations 4. Clean workstation * Workstation 6: 1. Add a small piece of zinc into a test tube 2. Add about 5 mL of CuSO4 to the same test tube 3. Observe the reaction for 2-3 minutes 4. Record Observation 5. Clean workstation * Workstation 7: 1. Combine 5-8 drops of AgNO3 and CaCl2 in a test tube 2. Observe reaction for 2-3 minutes 3. Record
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