Investigating the Rate of Reaction Between Marble Chips (Calcium Carbonate) and Hydrochloric Acid Aim.

To examine how the concentration of hydrochloric acid affects the rate at which it reacts with chalk.

This experiment is called Elephant’s toothpaste. Which is a decomposition reaction where hydrogen peroxide (H2O2) is decomposed with the aid of a catalyst (either Sodium iodide or Potassium iodide). By placing a small amount of detergent in the mixture the amount of oxygen produced can be determined by the volume of foam produced in 2 minutes. By performing the experiment at different temperatures its tests the effect varying the reaction temperature will have on the reaction rate. My hypothesis was If the temperature of the reaction rate is increased than the oxygen production will

The reaction you will be investigating is the reaction that occurs when an Alka-Seltzer tablet is placed into a given amount of water. Alka-Seltzer is an over-the-counter antacid and pain relief medication that is dissolved in water before it is ingested. Each tablet contains aspirin (acetylsalicylic acid), citric acid, and sodium bicarbonate. As the tablet dissolves in water, the bicarbonate ions in the tablet react with the hydrogen ions from the acids that are also contained in the tablet. The carbon dioxide gas produced by the reaction is what causes the bubbling that can be observed.

The results obtained show that the chalk ground to the smallest size was the second longest rate of reaction, the medium size was the longest rate of reaction and the largest chalk size was the shortest rate of reaction. The results of the experiment describe how the surface area of a reactant (the chalk) speeds up the rate of reaction when in contact with another reactant in this instance, the hydrochloric acid.

Recognizing the error is important, and only a few errors were found in this experiment. One example for these trials could be that the coffee filters weren’t exactly 3 x 3 centimeters. This is an error because the filter could pick up more solution and affect the speed that it would sink and rise. Also, with each baby food jar used, two coffee filters were dipped in it. If more coffee filters were dipped in the hydrogen peroxide, then more solution could be in the hydrogen peroxide affecting the times. It would affect the times because more solution molecules would be in the hydrogen peroxide and would collide with the new molecules on the coffee filter making the reaction time faster. Lastly the data would be more accurate if the amount of catalase solution on the coffee filter should be more controlled. This could happen by stirring the solution before and after the filter is put in, and holding the filter exactly five

The research question for the Alka Seltzer Lab is, “What is the effect of different surface areas of an Alka Seltzer tablets reaction time?’. Inside of an Alka Seltzer tablet there are two key ingredients; which are citric acid and baking soda. When a tablet is dropped into a liquid, the acid and baking soda show a physical reaction of fizzing and eventually dissolving. Materials needed for this lab was goggles, aprons, beakers, water of the same temperature, mortar pestle, and three alka seltzer tablets. In each beaker there was 150 mL of water. The first tablet was a full tablet, the second was broken into quarters, and the last tablet was crushed in a mortar pestle. The dependent variable of the lab was the rate of reaction, and the independent

As seen from the relatively small percentage error (1.49%) of my experimental result when compared to

The aim of this investigation is to observe the effect that the concentration of hydrochloric acid (independent variable) has on the rate of reaction (dependent variable) between the magnesium ribbon and the hydrochloric acid.

Throughout the experiment, countless calculations were made to calculate the enthalpy of formation for magnesium oxide. This was accomplished, first by finding the temperature change through use of a temperature probe within a chemical reaction with magnesium and hydrochloric acid, along with a chemical reaction containing magnesium oxide and hydrochloric acid. For the reaction that consisted of magnesium and hydrochloric acid, the temperature change was much more rapid compared to the reaction between magnesium oxide and hydrochloric acid. The reaction was gray in color, steamed, bubbled, and had a strange smell (likely consisting of the released hydrogen gas). In comparison, the reaction between magnesium oxide and hydrochloric acid was lackluster, producing no bubbles and staying relatively clear in color. Although most magnesium and magnesium oxide went from the weigh boat into the reaction, not all did, potentially affecting our final results.

AIM The aim of the experiment was to observe the effects the concentration as on the rate of osmosis. HYPOTHESIS The smaller the amount of concentration the quicker osmosis will occur.

However, some of these results were unexpected. For example: 0.00.50 seconds took for the marble to reach the base in the water and glycerin solution when we attempted third trial, but for the water solution, it took 0.00.54 seconds, which is quicker. However, water and glycerin was supposed to take longer time than the water because water has low viscosity. This is because random errors occurred, such as timing (when the object is released).

Concentration, Surface area, and Temperature) that played a role in controlling rate of reaction and record observations and key characteristics that were found when altering the standard composition of each factor. At the end of the investigation, there was a clear pattern that was present throughout all three factors. As you increase anything whether it be concentration, temperature, or surface area, the rate of reaction increased also. By increasing temperature, the speed of molecules increases encountering a larger quantity of other molecules increasing collisions and rate of reaction. This was clear in our observations table as our results show that warmer the temperature, the quicker the rate of reaction.

The Effect of Concentration on the Reaction Time of Hydrochloric Acid and Sodium Thiosulphate Introduction The speed if which a chemical reaction occurs is known as the reaction rate. When chemical reactions occur they can either happen at a slow or fast rate depending on the chemicals. The concentration of the chemicals has the largest effect on the rate of reaction. Concentration, which is usually measured in mass volume per unit is referred to as the ratio of a substance.

chips will be of the same size, amount and mass. I want to make sure

This is a safe mass of the solid, yet will still be enough to react