top but without it overflowing. 3.Add 10 drops of food coloring‚ to make the solution appear fairly dark. 4.Cut the Alka-Seltzer into 8 pieces. 5.Drop one of the tiny pieces into the oil and water mixture. 6.The mixture will start to bubble. 7.Wait until the bubbling stops and add another piece of Alka-Seltzer. 8.Continue until there is no more Alka-Seltzer‚ and the bubbling has completely stopped. 9.Screw on the cap of the soda bottle. 10.Tip the bottle back and forth
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recorded. Then‚ an Alka Seltzer tablet was filled in the water. After a while‚ placed the flask & water & Alka Seltzer tablet on to the balance pan‚ the mass of the whole system was determined. This procedure was for the open system. For the close system‚ a flask was taking out and filled in with 15ml of water. The mass of the flask & water was determined and recorded. Then‚ an Alka Seltzer tablet was placed in a balloon‚ and put the balloon on the top of the flask‚ the Alka Seltzer tablet fell into
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careful not to let the Alka-Seltzer tablet get wet before the bottle is closed by wiping the lip of the bottle and the cap so it remains dry‚ or risk gas escaping into the air and not being captured by the bottle. Also‚ the group must be sure to close the bottle tightly with the cap‚ because gas may escape this way as well. During this investigation‚ it was determined that there is 0 change in mass when a gas is produced‚ because the mass of the bottle‚ water‚ Alka-Seltzer tablet‚ and cap remained
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By crushing the Alka-Seltzer tablets to different extents‚ we were able to determine the effect of surface area on the rate of reaction. Trial 1 was the control and a full Alka-Seltzer tablet was placed in water at room temperature‚ 26.0 °C. It took 40.40 seconds for the tablet to react. Trial 4 was a crushed tablet reacted in water again at room temperature
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06.05 Rate and Collision Theory: Assessment Instructions Investigation of the Rate of a Reaction Background: The reaction you will be investigating is the reaction that occurs when an Alka-Seltzer tablet is placed into a given amount of water. Alka-Seltzer is an over-the-counter antacid and pain relief medication that is dissolved in water before it is ingested. Each tablet contains aspirin (acetylsalicylic acid)‚ citric acid‚ and sodium bicarbonate. As the tablet dissolves in water‚ the
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changes. Materials: * * Hot plate * Water * Salt * Evaporating dish * Candle * Matches * Ammonium hydroxide * Watch glass * Phenolphthalein * Paper towel * Cornstarch * Iodine * Cup * Alka-Seltzer tablet * Pipet * Milk * Vinegar * Copper II sulfate * Lead II nitrate Safety: * Goggles were worn. * Aprons were worn. * Lab station was cleaned up directly following experiments. * Hands were washed after
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different temperatures would change the reaction rates we had three flasks all containing varying temperatures of water(H20). One with cold water (4°C)‚ one room temperature (21°C)‚ and one with hot water (44°C). In each flask‚ we dropped one tablet of Alka-Seltzer‚ all within 0.008 grams of each other‚ into the three separate beakers and the duration until the tablet dissolved. The results showed a large change in the average reaction rate between the different temperatures. The cold water took 256.91 seconds
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questions with your team. Use your knowledge from Middle School! Materials Clean‚ plastic water bottle Vegetable oil Food coloring Alka-Seltzer package A funnel Water Procedure 1. 1) Add 100 ml of tap water to the bottle. 2. 2) Add 100 ml of vegetable oil to the bottle. 3. 3) Add a maximum of 3 drops of food coloring to the bottle. 4. 4) Add 2 alka seltzer tablets and observe. 5. 5) Say ‘ Wow‚ that is so cool!’. ‘I love Science!’ Questions Define the following terms and use them in
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base react to form water and salt. To illustrate‚ H+ hydrogen ions from the acid react with the hydroxide ions OH- from the base. Antacids are taken to relieve heartburn or indigestion caused by excess stomach acid. For instance‚ antacids such as alka-seltzers contain baking soda which is highly reactive with acids‚ settling the discomfort of indigestion. During the lab we used vinegar and various antacids to test what was most effective and why. The brands consisted of name brand and generic‚each type
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solution that allows resistance to significant change in pH when small amounts of strong acids or base are added to it. (Boundless‚ 2015) This is usually formed when a weak acid is added to a salt of its conjugate base. (Chemicool.com‚ 2014) When an Alka Seltzer tablet is dissolved in water‚ a buffer is formed when the weak acid citric acid is present with sodium citrate (citrate ion) the conjugate base (Buffer Balancing Acts Buffers‚ 2009) "Na3C3H5O7 (aq) + 3 HCl (aq) H3C3H5O7 (aq) + 3 NaCl (aq)"
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