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The volume of vinegar in the solutions was varied from O to 35 ml in 5-ml increments. The experiment was started by measuring the mass of one tablet and the total mass of the 35-ml vinegar-water solution in the cup. The tablet was then dissolved in the vinegar- water solution. The cup containing the reaction mixture was carefully swirled to ensure complete dissolution of the tablet. The total mass of the reaction mixture in the cup was measured when the reaction (bubbling) stops. The procedure was repeated with all vinegar-water solutions, and the percent by mass of the acted Enhance in a tablet is calculated for each run of the reaction.

After the experiment, a graph of percent by mass of the reacted Enhance in a tablet versus the volume of vinegar used was constructed. The percent by mass of the reacted sodium bicarbonate in the tablet initially increased with the amount of vinegar used and then reached a steady value. As shown in the graph, when less than 20 ml of vinegar was used, the acid was the limiting reactant. When the volume of vinegar was increased, more sodium bicarbonate reacted and more CO was produced. The percent by mass of the reacted sodium bicarbonate increased with increasing amounts of vinegar.

When the volume of vinegar exceeded 20 ml, Sodium Bicarbonate became the limiting reactant. Since the content of sodium bicarbonate is fixed, the amount of the product (CO ) remained unchanged regardless of the volume of vinegar used and the percent by mass of the reacted Enhance showed a constant value. Error in the lab could’ve occurred when using different beakers due to sizes or water could’ve possibly been left in the beaker before adding additional water for the next trial. An error could’ve occurred when moving the Alkali-Seltzer tablets from inside the classroom to outside because the tablets were only placed on a towel.

Parts of the tablet could’ve fallen off of the towel when moving. This means that the tablets wouldn’t have weighed as much as one thought they did. Improving this lab could include, using the same size beaker and same type of beaker so no beaker weighs more than the other. Also drying off each beaker before adding additional water could be done so additional weight is not added. An additional improvement could be made by using something to hold each weighed out abele so no excess can fall off while moving them from the classroom to outside.

Conclusion In the Alkali-Seltzer Rocket lab the percent by mass of the reacted sodium bicarbonate in the tablet initially increased with the amount of vinegar used and then reached a steady value. As shown in the graph, when less than 20 ml of vinegar was used, the acid was the limiting reactant. When the volume of vinegar was increased, more sodium bicarbonate reacted and more CO was produced. The percent by mass of the reacted sodium bicarbonate increased with increasing amounts of vinegar. When the volume of vinegar exceeded 20 ml Sodium Bicarbonate became the limiting reactant.

Since the content of sodium bicarbonate is fixed, the amount of the product (CO ) remained unchanged regardless of the volume of vinegar used and the percent by mass of the reacted Enhance showed a constant value. Error in the lab could’ve occurred when using different beakers due to sizes or water could’ve possibly been left in the beaker before adding additional water for the next trial. An error could’ve occurred when moving the Alkali-Seltzer tablets from inside the classroom to outside because he tablets were only placed on a towel.

Parts of the tablet could’ve fallen off of the towel when moving. This means that the tablets wouldn’t have weighed as much as one thought they did. Improving this lab could include, using the same size beaker and same type of beaker so no beaker weighs more than the other. Also drying off each beaker before adding additional water could be done so additional weight is not added. An additional improvement could be made by using something to hold each weighed out tablet so no excess can fall off while moving them from the classroom to outside.

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