Experiment 7 Gooch filter crucible or fritted-glass funnel Mother liquor- liquid from which a substance precipitates or crystallizes Filtrate- liquid that passes through the filter Slurry- suspension of solid in liquid Calcium ion can be analyzed by precipitation with oxalate in basic solution to form CaC2O4.H2O The precipitate is soluble in acidic solution because the oxalate anion is a weak base CaC2O4.H2O (calcium oxalate monohydrate ; MW = 146 g/mol) Equation: Ca2+(aq) + C2O42-(aq)
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1. Iron (IIII) and copper (II) sulfate solution Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction. 2 Fe + 3 CuSO4 = 3 Cu + Fe2(SO4)3 The new product is iron (III) sulfate‚ it contains the Fe 3+ ion which is brown. Lead (II) nitrate and potassium iodide solutions Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations
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Stoichiometry • Calculations involving quantities of consumed reactants and formed products based on a BALANCED chemical equation. Mass Molar Mass Mole Coeff Bal Eqn Mole Molar Mass Mass Example 2 • The Haber Process involves reacting gaseous nitrogen and gaseous hydrogen to form ammonia. Determine the mass in grams of hydrogen gas required to form 1.00 x 103 g ammonia. Your Turn 2 • If you react 52.9 g of potassium chlorate (KClO3) with excess phosphorus
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from valves to electronics‚ down to microelectronics and quantum computing. It mirrors the downsizing in focus in the biological sciences‚ from cells to genomics. Conversely‚ achievements in chemistry have been converging into the nanometre range from below – from atoms and molecules to supramolecular chemistry. Nanochemisty focuses on the unique properties of materials in the 1–100 nm scale. The physical‚ chemical‚ electrical‚ optical and magnetic properties of these materialsare all significantly
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THE EFFECT OF HYDROGEN BONDING ON RESISTING FLOW Design Investigating a factor affecting the viscosity of a mixture of liquid Research Question The effect of hydrogen bonding on resisting flow of five different liquids Background Theory Viscosity is the resistance of a fluid to flow‚ either within itself‚ or to moving past an objects moving through it. A liquid with high viscosity is thick and flows slowly. A liquid with a low viscosity is thin and flows quickly. Different liquids
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Dear Mrs Lewis‚ Hello Mrs Lewis‚I’m writing to you because I have an assignment to do for language class.So these are some reasons why you made a difference in my life.Mrs Lewis made a difference in my life because she was one of the teachers that made my day happy.Another reason why you made a difference in my life is because you were one of the teachers that would read us a book and they were actually interesting and some were funny.And the last reason why you made a difference in my life was
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
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Isotopes and average atomic mass Isotope: element variations with different atomic mass but same atomic number Isotopic Abundance: the relative amount in which each isotope of an element Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u] 1) Given average atomic mass: 10.81u If given percentages‚ you can find average atomic mass by adding each portion 2) Set variables for unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate:
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Scuba diving is a form of underwater diving in which a diver uses a scuba set to breathe underwater. According to the Professional Association of Diving Instructor (PADI)‚ a “DEEP DIVE” is considered to be anything from 18 meters (60 ft) to 30 meters (100 ft). A scuba diver moves around underwater by using swim-fins attached to the feet‚ however external propulsion can be provided by a diver propulsion vehicle. Scuba diving may be performed for a number of reasons; either for recreational purposes
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FINAL SUMMATIVE PRESENTATIONS This evaluation will involve working in groups of 3 to prepare a written report‚ poster and a demonstration of food preparation of your chosen topic. PART A: WRITTEN REPORT This should give the reader background information on your selected topic. This information will be shared with the class as an ongoing commentary in addition to your demonstration. The report will be typed using proper report format with a title page and subheadings. It should
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