rack Two test tube holders Two spatulas Three 250 mL beakers One stirring rod One medicine dropper Alcohol lamp or Busen burner Water bath One looped platinum or nichrome wire Label REAGENTS 0.5 M CaCl2 0.5 M BaCl2 M NaOH 0.1 M AgNO3 0.5 M KCl 0.5 M KBr 0.5 M KI 2 M NH4OH M KCN % H2O2 2 M H2SO4 MnO2 Saturated FeSO4 0.1 M NaNO3 CH3COOH 0.5 M Na2SO3 0.1 M KSCN 2 N KOH 0.5 M K4[Fe(CN)6] 0.5 M FeSO4 0.5 M FeCl3 0.5 M Al2(SO4)3 2 N HCl 0.5 M LiCl 0.5 M NaCl 0
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10 Test Tube Mystery Introduction: The students were handed 10 test tubes with no identification. The students were supposed to design a method in determining what chemical was in each test tube. The list of chemicals is CuSO4‚ NH4Cl‚ NaOH‚ AgNO3‚ KI‚ H2SO4‚ NaBr‚ CaCl2‚ HCl‚ and Pb(NO3)2. The students are expected to determine the chemicals using physical properties‚ litmus paper‚ solubility‚ and the process of elimination. Physical properties‚ such as the color‚ can be determined by sight. Litmus
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HCI and blue dye A deep blue E Blue dye 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
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Test tube holder 3. Graduated cylinder-10ml 4. Dropper pipet. 5. Bunsen burner 6. Safety goggles 7. Lab coat 8. 0.1 M AgNO3 9. Safety: Handle the hydrochloric acid with extreme care. Avoid spills on your skin or clothing. Always wear safety goggles and a lab coat or apron when working in the lab. Procedures Relative activity of some metals. 1. Add 5ml of 0‚1 M AgNO3‚ to a clean‚ dry tube. Add a piece of copper metal into this solution. Add 5ml of 0.1 M solution. Record your observations
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silver chloride through precipitation gravimetry. The colloidal silver chloride originally formed was converted to a crystalline solid by controlling certain parameters of the experiment such as temperature‚ pH of the solution‚ and concentration of AgNO3. Once the solid was large enough‚ it could be washed‚ filtered‚ and weighed. The percentage of chloride present was found to be 24.73695223 (±0.00000006) %. Introduction The purpose of this lab was to determine the percentage
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reacted out. Purpose – The purpose of this lab was to be able to predict the phase of matter after a double replacement reaction‚ what the products were‚ and if the reaction was completed or not. Materials and Methods - • .1 M NaCl • .1 M AgNO3 • .1 M Na3PO4 • .1 M NaOH • .1 CuSO4 • Five droppers • Spot Plate • Pen/Pencil • Paper • Goggles • Apron Safety Precautions – • Wear goggles and apron at all time while inside the lab. • You may use rubber gloves o protect your hands
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precipitate? It is a product of a reaction thats is insoluble and separates from a homogenous mixture as a solid. 6. Balance these equations: KBrO3(s)--------> KBr(s) + O2(g) Balanced: 2KBrO3(s)--------> 2KBr(s) + 3O2(g) MnBr2(aq) + AgNO3(aq) --------> Mn(NO3)2(aq) + AgBr(syou Balanced:MnAg2(aq) + 2AgNO3(aq) --------> Mn(NO3)2(aq) +2AgBr(s) 7. How could you distinguish between the gases H2 and NO2? H2is a colorless‚ odorless gas while NO2 has a reddish-brown color and
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Limiting Reagents and Percentage Yield Worksheet 1. Consider the reaction I2O5(g) + 5 CO(g) -------> 5 CO2(g) + I2(g) a) 80.0 grams of iodine(V) oxide‚ I2O5‚ reacts with 28.0 grams of carbon monoxide‚ CO. Determine the mass of iodine I2‚ which could be produced? 80 g I2O5 1 mol I2O5 1 mol I2 1 333.8 g I2O5 1 mol I2O5 28 g CO 1 mol CO 1 mol I2 253.8 g I2 1 28 g CO 5 mol CO 1 mol I2 b) If‚ in the above situation‚ only 0.160 moles‚ of iodine‚ I2 was produced
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Selective precipitation of the Barium Magnesium Group Chem 112-004 Abstract The purpose of this experiment is to separate and identify the cations of Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+ using differences in solubility and confirming test to identify the unknown solution used in this experiment. In this experiment the methodology used by the group is to perform the tests for both the unknown and the cations (Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+) using the known as a control for comparison and identification
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Shinhye Lee Chem101 4.16 Specify what ions are present upon dissolving each of the following substances in water: a) MgI2(aq) -> Mg 2+ (aq) +2OH-(aq) b) Al(NO3)3(aq) -> Al3+(aq)+3NO3- (aq) c) HCLO4(aq) -> H+ (aq) + ClO4- (aq) d) NaCH3COO(aq) ->Na + (aq) + CH3COO-(aq) 4.22) In each reaction‚ the precipitate is in bold type. a) Ni(NO3)2 (aq) +2NaOH (aq) ->+2NaNO3(aq) + NiOH2 (s) b )No precipate‚ therefore‚ no reaction. c) Na2S(aq) + CuCH3COO (aq) -> CuS(s) + 2NaCH3COO
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