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Endothermic or Exothermic Lab

Endothermic or Exothermic Lab. Question: What happens when you put an alka seltzer in water? What type of reaction is it? Endothermic or Exothermic? What is the overall enthalpy? Form your hypothesis. Procedure: Put 25 ml of water in your beaker. Record the temperature

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Endothermic or Exothermic Lab

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  1. Endothermic or Exothermic Lab

  2. Question: • What happens when you put an alka seltzer in water? • What type of reaction is it? Endothermic or Exothermic? • What is the overall enthalpy? Form your hypothesis.

  3. Procedure: • Put 25 ml of water in your beaker. • Record the temperature • Place an alka seltzer tablet in your beaker. • Record your temperature every 5 seconds

  4. Data • Form a chart showing temperature and time

  5. Results • What happened to the temperature? Based on your chart

  6. Conclusion • What type of reaction is an alka seltzer in water?

  7. Alka Seltzer Equation • C6H8O7 + 3NaHCO3 → 3H2O + 3CO2 + Na3C6H5O7 • Citric acid + baking soda → water + carbon dioxide + sodium citrate & carbon dioxide is released as a gas. • According to Wikipedia: The effervescent action of Alka-Seltzer, is a reaction to the baking soda (sodium bicarbonate) and citric acid in the tablet. (The Citric acid is in solid form and once diluted in water reacts with the baking soda). • It is really just for show as it doesn't actually do anything. The medicine is also in there and would work just as well without the little baking soda 'show'.

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