An antacid tablet contains citric acid and sodium bicarbonate (baking soda). Whe
ID: 1030174 • Letter: A
Question
An antacid tablet contains citric acid and sodium bicarbonate (baking soda). When you drop the tablet in liquid, the acid and the baking soda react this produces the fizz. 3 HCO ()H3CsHs07 ()>3 CO2()3 H20CH0 (00) bicarbonate ion citric acid citrate ion Several factors affect the rate of a reaction. In this investigation, you will design experiments to test three factors that may affect the rate of the reaction that takes place when an antacid tablet dissolves in a liquid. Possible Materials: jars, antacid tablets, water, ice, timing device, thermometer, vinegar (an acetic acid solution), salt, measuring spoons, measuring cups Procedure: 1. Choose three factors to investigate. 2. Form hypotheses about how the factors will affect the rate of the 3. List the steps you will follow to test your hypotheses. Consult with 4. Carry out your experiments. Be sure to adhere to lab safety rules 5. Record your observations. reaction. your Learning Coach before performing your experiments. as you perform the experiments. 6. Draw conclusions from your experiments. Describe the relationships between the three factors you tested and the rate of the reaction. Explain whether or not your results support your hypotheses. Note any sources of errors. 7. Complete a formal laboratory report which includes a heading, materials, hypotheses, procedures, data, and conclusionsExplanation / Answer
The antacids are bases with a pH above 7.0 that react with acid to neutralize them.
C6H8O7 + 3 NaHCO3 ------>Na3C6H5O7 + 3H2O +3CO2(gas bubble)
(1.) the three factors that affect the rate reaction is as follows;
a) surface area of antacid tablets(starting material ).
b)concentration of starting material.
c) temperature.
(2)
the rate of reaction depends on How fast the reactant molecules collide with each other. more the surface area contact with reacting molecules more the effective collision will occur. Then, the reaction will proceed forward.
Antacid reacts with stomach acid.The quantity required to neutralize stomach acid that is the concentration of antacid (starting material).
As the temperature increases, the water molecule collides faster with antacids tablet, allowing the reaction to occur faster.