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Signs of a Chemical Reaction Demos

Signs of a Chemical Reaction Demos. 1. Blue Bottle Measure 5g Dextrose Measure 5g NaOH pellets Add to 250ml water Place ¼ drop 1% methylene blue Conical flask Stopper Shake the flask until NaOH is dissolved Wait. 2. Foam Column Potassium Permanganate (flat spoonful)

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Signs of a Chemical Reaction Demos

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  1. Signs of a Chemical Reaction Demos

  2. 1. Blue Bottle • Measure 5g Dextrose • Measure 5g NaOH pellets • Add to 250ml water • Place ¼ drop 1% methylene blue • Conical flask • Stopper • Shake the flask until NaOH is dissolved • Wait • 2.Foam Column • Potassium Permanganate (flat spoonful) • Squirt of detergent - enough to cover the KMnO4 • 30-50ml of hydrogen peroxide (slowly add) • 3.BurningMagnesium • 2cm of Mg • Hold in tongs • Ignite • Burningsteel wool • Bunsen burner mounted horizontally • Ball of wool • Then spread the wool out

  3. Solid Reaction • 1 test tube containing Potassium Iodide • 1 test tube containing Lead Nitrate • Pour the KI into a conical flask • Carefully lower the test tube of PbNO3 into the flask • Place on stopper • Place on balance and zero • Tilt flask to spill the PbNO3 • Endothermic Reaction • 10g Barium Hydroxide • 10g Ammonium Nitrate • Mix two in a 80ml beaker • Stir with glass rod - be careful of the fumes • Measure temperature • Ethanol Flare • Splash of Ethanol into the bottom of a 5 gallon water container • Swill to fill container with Ethanol vapour • Ignite at arms length • Carbon Pillar • 40ml white sugar • H2SO4 • Small beaker (80ml) • Enough of the H2SO4 to cover the sugar

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