|weighing paper | |concentrated HNO3 (4 – 6 mL) |6.0 M H2SO4 (15 mL) | |graduated cylinder |granular zinc | |3.0 M NaOH (30 mL) |methanol | |carborundum boiling chips |acetone
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Physical and Chemical Reactions Lab #4 Alesa Cannon Objective: To investigate the physical and chemical properties of a pure chemical substance. Procedure: 1. Half-fill one well of a 24-well plate with 6 M HCl and half-fill a second well of the 24-well plate with 6 M NaOH. Suck up these chemicals into their labeled pipets for later use. 2. Perform the following steps on each of the substances to be tested. Complete all tests of one substance and record your observations before proceeding
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4: Data Tables |Solubility or Reaction | Substance Name |Color |Odor |Effect of Heat |Cold H2O |Hot H2O |Litmus Test |Dilute HCl |Dilute NaOH | |Mg |Silver |None |No Change |Floated/ not soluble |slight bubbles |Basic | Got hot and fizzy |No Change | |Cu |Copper |None |turned black |not soluble |No Change |No Change |No Change |No Change | |Zn |Silver |None |No Change |not soluble
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temperature‚ surface area‚ pH and certain chemicals on the activity of catalase. Equipment: Dilute hydrochloric acid solution x 1ml 10 volume hydrogen peroxide x 100ml Copper sulphate solution x 1ml Aluminum nitrate solution x 1ml Zinc nitrate solution x 1ml dilute NaOH solution x 1ml Mortar and pestle x 1 25ml Beaker x 1 Hot plate x1 Porcelain tile x 1 Toothpicks x 8 10ml pipette Spatula x 1 knife Test tube X 11 Test tube rack x 1 Samples: Clean sand‚ potato
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2013 Title: Properties of Gases Purpose: To analyze a few physical and chemical properties of gases as well as using those properties to identify the gases. Procedure: * For Hydrogen I placed a piece of Zn metal into a test tube with diluted HCl. * To produce oxygen I added Hydrogen peroxide to manganese. * Next‚ I added baking soda to vinegar. This caused a quick and energetic reaction! The gas from the reaction I pumped into some Limewater. * Then I mixed Alka Seltzer and water
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Instructor’s Guide Master Materials List (complete for 24 students working in pairs) Silver nitrate‚ AgNO3‚ 0.2 M‚ 100 mL* Silver nitrate‚ AgNO3‚ 0.1 M‚ 100 mL* Cupric nitrate‚ Cu(No3)2‚ .02 M‚ 100 mL* Zinc nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Ferric nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Hydrochloric acid‚ HCl‚ 6 M‚ 125 mL* Nitric acid‚ HNO3‚ 6 M‚ 125 mL* Ammonia‚ NH3‚ 6 M‚ 125 mL* Sulfuric acid‚ H2SO4‚ 6 M‚ 125 mL* Acetic acid‚ CH3COOH‚ 6 M‚ 125 mL* Sodium chloride‚ NaCl‚ 0.2 M‚ 100 mL* Sodium carbonate
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Reactions (Nonredox) In a 50-mL beaker‚ 2-3 drops of phenolphthalein indicator was added to 9 mL of 0.1 M HCl. Then‚ 10 mL of 0.1 M NaOH was added drop wise with a pipet to the beaker of phenolphthalein and HCl. Observations about the color of the solution at each step was especially noted. To a 150-mL‚ 0.1 gram of sodium hydrogen (solid) was measured and added. Drop wise‚ 1 mL of 1.0 M HCl was slowly added. The characteristics of the reaction were recorded. Metathesis- Amphoteric Hydroxides and
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in detail. 12. What are the precautions taken in the preparation of hydrogen in the laboratory ? 13. Name the method of collection of hydrogen in the preparation of hydrogen in the laboratory .Why ? 14. The addition of what enhances the reaction of zinc wit h dil. Acid? 15. What are the preferred acids in the preparation of hydrogen ?Which acid is not used and why ? 16. Give reasons for the following: a] The lower end of the thistle funnel should dip below the level of the acid in the flask. b] Hydrogen
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HKDSE CHEMISTRY – A Modern View (Chemistry) Coursebook 3 Suggested answers Chapter 25 Simple molecular substances with non-octet structures and shapes of simple molecules Page Number Class Practice 1 Chapter Exercise 2 Chapter 26 Bond polarity Class Practice 4 Chapter Exercise 5 Chapter 27 Intermolecular forces Class Practice 7 Chapter Exercise 9 Chapter 28 Structures and properties of molecular crystals Class Practice 11 Chapter Exercise 12 Part Exercise 14 Chapter 29 Chemical cells in daily life
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and another reason is so that the pressure is increased due to the little space the solution has. If the pressure is increased then the gases will form quicker. B. What happens to the zinc in the hydrogen generation experiment? The zinc in the hydrogen generation experiment displaces with the HCl to form hydrogen gas. C. What happens to the manganese in the oxygen generation experiment? The manganese and the H2
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