alka seltzer lab essay

Alka-Seltzer contains both baking soda (NaHCO3) and citric acid (H3C6H5O7). The reaction between the bicarbonate ion and citric acid produces water, carbon dioxide, and the citrate ion. Equation 1 shows the balanced equation for the reaction, which can be expressed by, C_6 H_8 O_7 (aq)+ 3NaHCO_3 (aq)→ 3H_2 O(l) + 3CO_2 (g) + Na_3 C_6 H_5 O_7 (aq) (1) The evidence that this is a chemical reaction and not a physical change is that gas can be seen bubbling to the surface when the Alka-Seltzer dissolves

- Describe what the results were. On average the Alka Seltzer tablet dissolved faster in hot water in comparison to ice cold water and room temperature water. The beaker with ice cold water caused the Alka Seltzer tablet to dissolve the slowest. The three beakers containing different temperatures of water, all produced carbon dioxide bubbles; however, the beaker containing hot water produced the bubbles more rapidly. - Explain why the results were the way they were. As the temperature of the water

After analyzing and interpreting the data from the investigation, greater Alka-Seltzer tablet surface area (ex. whole tablet vs powdered tablet) most often led to higher reaction rates, measured in gas displacements (which also increased, refer to Table III). It was hypothesized that if an Alka-Seltzer tablet’s reaction rate is correspondent to its surface area, then gradually maximizing its surface area would consequently increase its rate of reaction, due to an increased number of exposed surface

the seltzer would dissolve the alka seltzer the fastest, because the seltzer was already carbonated. After doing the experiment we found out that the seltzer was the 2nd fastest at dissolving the tablet, and the water dissolved the alka seltzer 6 seconds faster than the seltzer. This being said our hypothesis turned out to be wrong because the water (fastest to dissolve the alka seltzer) has fewer chemicals, so it dissolved the tablet faster. We thought the less chemicals the slower the alka seltzer

conjugate acid. Alka seltzer acts as an antacid. It uses sodium hydrogen carbonate to neutralise excess hydrochloric acid in the stomach and thus relieves heartburn. Here, the bicarbonate reacts with a proton(from excess acid in the stomach)to release carbon dioxide(H20 + co2). It can also neutralise the hydroxide ions forming carbonate ion and a water molecule HCO3-(aq) + OH-(aq) –> CO32-(aq) + H2O(l) HCO3-(aq) + H+(aq) (-- removed HTML --) CO2(g) + H2O(l)

ANALYSIS OF RESULTS: Throughout the course of the experiment, the weight of the beaker and liquid, the weight of the Alka-Seltzer tablet, the weight of the beaker with liquid plus the weight of the tablet, and the weight of the beaker with all of the contents after the bubbling ceased remained roughly constant and did not vary widely. However, a trend is able to be seen in Figure 1. It is clear that as the mL of vinegar used in each experiment run increased, the mass percent of NaHCO3 increased

Amount of Water Colin Lee Dr.Cooper Chemistry 12 Introduction: Alka-seltzer contains three active ingredients, aspirin, sodium hydrogen carbonate and citric acid. It is used for headaches, migraines, and cold and flu symptoms. Alka-Seltzer is usually taken when dissolved in a glass of water. When placed in water a series of chemical reactions result into Sodium citrate and Sodium acetylsalicylate. The sodium citrate would act as the antacid for stomach pains, and the sodium acetylsalicylate

What Is the Percent by Mass of NaHCO3 in Alka-Seltzer Tablets? When it comes to understanding how starting material and product effect each other, it has been inevitably thought that the amount of starting material has always included a limiting and excess reactant that conclusively determines the product amount. The Lab Manual stated in applicable cases, such as buying amounts of starting material to form a certain product, could change a reaction, or have economic effects of wasting unnecessary

independent variable for this experiment is the different temperatures being used, the dependent variable is the reaction time for the Alka-Seltzer tablets. The scientist hypothesis is if reaction time is related to temperature, then placing Alka-Seltzer tablets in hot water will cause it to react faster the other temperatures involved. The scientist will place Alka-Seltzer tablets into water and see which temperature has the fastest reaction time. This experiment has been done many times just simply

different temperatures will be used to observe the effect of temperature in dissolving Alka Seltzer tablets. Four different temperatures as 25 degrees Celsius, 45 degrees Celsius, 65 degrees Celsius, and 85 degrees Celsius will be arranged before the experiment by using a heating pad. 25 degrees Celsius indicates the average room temperature and equal increases will be chosen to observe different responses of Alka seltzer to different temperatures. Hydrochloric acid is a strong acid whose pH is value