Alka Seltzer Dissolving at Different Temperatures Essay example -- Alk

Alka Seltzer Dissolving at Different TemperaturesThe variable that I will change will be the temperature of the waterthat the Alka Seltzer is put in.For my results I will measure the time reachn for the Alka seltzertablet to completely dissolve in water at different temperatures.Input variables* Varying heighten area of Alka-Seltzer tablet, i.e. if cut intosmaller pieces or crushed it will plus the surface area. (Ifthe surface area is increased (more powdered) the rate of reactionalso increases. This substance that there are more collisions betweenthe solid and liquid.)* Amount of tap water H2O used, i.e. volume (ml).* Amount of Alka-Seltzer tablets used, i.e. quantity of tablets.(one is used)* Number of times the etymon is stirred. (If the solution isstirred more there are more collisions between the particlestherefore the reaction is speeded up.)* Temperature of Water-C. (As the temperature increases so does therate of reaction. By increasing the temperature, particles movefa ster, i.e. they train more energy. So, they collide with moreenergy and more frequently.)* pH of Solution Water has pH of 7 at 25C. As the pH decreases,i.e as the solution increases in acidity, the rate of the reactionincreases as well.Output Variables-----------------Rate of reaction depends on all the 6 points I have stated to a higher place-----------------------------------------------------------------* If the surface area of the tablets is increased by crushing, theparticles around it in the solution will have more area to workon, and the rates of reactions will increase because there will bemore collisions. Complete reaction will finish faster.* The more amount of water used as we increase the temperature, thequicker the tablets will dissolve because there will be more waterparticles to collide with. So the rate increases.* If the amount of tablets being used is increased for the kindredamount of water, i.e as concentration increases, rate willincrease as well because ther e will be more collisions betweenparticles.* If the water with Alka-Seltzer tablets are stirred during thereaction, then the rates of reactions will increase because theparticles will be forced to make contact with each others andreact much quicker, rather than take their time to make contact,and therefor... ... water bath could have been used, because I could set itto my required temperature. Also it would mean that the solutioninside it would reach the exact temperature or close to It., and notincrease or decrease once the water inside it has reachedequilibration.It was also very difficult for me to observe exactly when theAlka-Seltzer tablets had totally dissolve and consistently decidethis for every result obtained. This was probably the main factor thatwould have decreased the accuracy of my readings. To avoid thishappening I would have infallible to use specialized piece of equipmentwhich would tell me exactly when the tablet was dissolvedOverall, I can come to firm conclusi on from my results that support myprediction and priming knowledge that As the temperatureincreases, less time will be required for a reaction to take placei.e. the rate of reaction increases.To improve the experiment overall I could use distilled water to avoidinaccuracies related to the hardness of tap water. I believe I shouldget a straight direct contrast curve.Another improvement I could have made is to increase the range of thetemperatures investigated. (10C to 100C).