robawalsh Posted November 28, 2011 Report Share Posted November 28, 2011 "Introduction: The rate of a chemical reaction should be affected by the pH of the solution if the reaction involves production of a buffer. Alka-Seltzer or other effervescent tablets are used with solutions of various pHs to determine the time for a complete reaction to occur. Alternatively, the amount of gas produced in a specific amount of time can be determined.Activity: Each group of students should have access to solutions of varying pHs such as distilled water ( ~pH 6 due to dissolved carbon dioxide), pH 5, pH 4, pH 3, pH 2 (about the acidity of lemon juice), and pH 1. Each group should perform the experiment using water and 2 other pHs as assigned by the teacher."How does this work? Which/How is a buffer produced in this reaction?I assume CO2 gas can be measured to determine the rate of reaction for each pH solution? Reply Link to post Share on other sites More sharing options...
Drake Glau Posted November 30, 2011 Report Share Posted November 30, 2011 Are you able to list what is actually in your tablet? Alka-Seltzer doesn't mean anything in chemistry Reply Link to post Share on other sites More sharing options...
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