Mole Ratios Lab Report

A mixture of elements is what is known as compounds. Chemical reactions occur when particles react with each other and atoms in molecules get rearranged. Reactions happen either rapidly or slowly. The speed of a reaction is known as the rate of the reaction. This speed of chemical reaction depends on many factors such as temperature, particle size of reactants, and the intensity of reactants.

Continue to heat the solution until it reaches about 55℃. Using the test tube holder, transfer the liquefied solution tube to the 25℃ water and record the temperature at 30-second intervals using a clock or stopwatch using a pencil until the solution reaches 35℃ or close to the temperature due to experimental error. While cooling, gently stir the solution using the thermometer until the solution begins to solidify. Once all the data is collected, reheat the solid solution tube in the warm water until it melts and remove the thermometer and wipe it off to avoid the solution adhering to the thermometer. After the data has been recorded, clean-up the lab station and put away the lab

Now we place into the Erlenmeyer flask filled with Na2SO3 (aq), 30ml of 0.3 mol/L solution of HCl. 6. Right after mixing the two solutions, we quickly put the cap on the flask so that all of the gas produced is transferred through the glass tubes into the measuring cylinder. 7.

a. Remove the piston or plunger and place the same amount of leaf disks into both syringe barrel. Replace the plunger being careful not to crush the leaf disks. Push on the plunger until only a small volume of air and leaf disk remain in the barrel. Show in Figure 4. Figure 4.

In this lab, a total of 9 reactions were complete, mixing 3 powders and 3 liquids. The powders were baking powder, baking soda, cornstarch. The liquids were water, iodine solution, and acetic acid. Of these experiments, 5 were chemical reactions and 4 were only physical changes. Of the powders, baking powder was the most reactive because it chemically reacted with all 3 liquids.

Background: The study of stoichiometry is a branch off Chemistry its the study of the amounts of substances that are involved in reactions. For this experiment kinetics is a huge part of it. Kinetics is explained as the reaction speed and or rate of reaction. To observe these reactions made by having reactants, sodium hydrogen carbonate, NaHCO3 known as baking soda and acetic acid, CH3COOH that is vinegar being mixed together.

Add another 25cm3 of Methanol and Ethyl acetate to the solutions. Stir gently for 20 minutes using a stirring rod this is to allow more of the active ingredients to mix with the solution. 16. Take two funnels and place one in two separate clean measuring beakers making sure the bottoms of the funnels don’t touch the bottom of the measuring beakers. Take two pieces of filter paper and press one onto each funnel.

The concentration can affect the chemical reaction if there is more of the substance, there would be a larger chance that molecules will collide and make the rate of the reaction faster. If there is less of the substance, less molecules would collide, and the reaction would be slower. If the surface area of the reactant is expanded, more particles are exposed to the other reactant and more particles would collide and make the rate of reaction increase. The temperature affects the experiment when the chemical reaction would result in a higher reaction rate, as the particles are heated, they move faster and there are more collisions. Ending with the Catalysts.

2 Finally rinse the burette at least twice with small portions of yours NAOH solution to ensure that all water is removed. 3. Fill the burette with NAOH sol. Using funnel. 4.

Shayna Salloway AP Chemistry A Snyder 11 September 2014 Title: Finding Mole Ratios of Reactants in a Chemical Reaction Purpose: Experiment using the method of continuous variations to figure out mole ratios of reactants. Procedure: 1.

Ideally, every mole of each reagent would be used up, and theoretical yield, we are assuming that every last mole of the reactants would

A second category of chemical reaction is a decompasition. A decompasition reaction occurs when one molecule, is broken down into simpler one. For example, hydrogen peroxide, a common household disinfectant, slowly breaks down into liquid water and oxygen gas over time. The reaction for this process is 2H2O2 --> 2H2O + O2. Another category of chemical reactions is single-replacement.

The resulting reaction between the two chemicals is such that for each gram of A, 4 grams of B is used. It is observed that 30 grams of the compound C is formed in 10 minutes Determine the amount of C at time t if the rate of the reaction is proportional to the amounts of A and B remaining and if initially there are 50 grams of A and 32 grams of B. How much of the compound C is present at 15 minutes? Interpret the solution as t →∞ ?

In order to measure the quantity of each molecule present, Stoichiometry was used to test the quantitative relationship between products and reactants in a chemical reaction (Graves, 2014). Stoichiometry is helpful because it uses amount of the starting reactant to estimate the amount of products formed and vice versa. The chemical equation must be balanced, meaning all of the atoms present in the reactants side must also be present in the products side (Burdge, 2014). By using the right quantities in a balanced chemical reaction, the amount of products desired can be determined as well as the quantities of the reactions using mole to mole and mole to mass ratios (Burdge, 2014). For example, using the chemical

To do this, put 10-15 mL of solution in a test tube and secure it to the stand. Then take a stopper with two holes on the top, and in one hole put the tube, and in the other put the lab quest ( to keep track of the temperature). Fill a beaker with cold water and put another test tube inside of it and