Individuality Mole Ratios Lab Report

A chemical reaction is when substances (reactants) change into other substances (products). The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. In this lab, the five general types of chemical reactions were conducted and observations were taken before, during, and after the reaction. Then the reactants and observations were used to determine the products to form a balanced chemical equation. The purpose of this lab was to learn and answer the question: How can observations be used to determine the identity of substances produced in a chemical reaction?

3. Find the number of atoms of each of the substances involved in the reaction.

In your laboratory notebook sum these two reactions to find the stoichiometric factor that relates moles of

From the calculations in the data analysis, the actual percent composition of magnesium is 65.3% ± 1.7%, the actual percent composition of oxygen is 34.7% ±2.5%. The purpose of this lab was achieved as the percent composition of the magnesium oxide was determined and was used to test the law of definite proportions. The hypothesis was mostly correct as the results demonstrated that the actual percent composition was only slightly greater/lesser than the hypothesized percent composition. However, the actual percent composition may have been affected by several limitations during this investigation.

From the results that were acquired from mixing the liquid reagents with each powder, it was determined that Unknown Mixture #1 consisted of baking soda and cornstarch. When individually testing the substances from Unknown Mixture #1 with the liquid reagents, a few noticeable reactions occurred. Mixing baking soda with vinegar caused bubbling to occur. This is because a neutralization reaction took place between the two reactants. In this reaction, sodium bicarbonate(baking soda) reacts with vinegar and produces sodium acetate, water, and carbon dioxide(HC2H3O2(aq) + NaHCO3(aq) NaC2H3O2(aq) + H2O(l) + CO2(g) ). The gaseous carbon dioxide most likely tried to escape into the atmosphere and caused the bubbling to occur. Another noticeable reaction

2. (5 pts) List and explain the names and affiliations of the various characters/stakeholders in this story – I’m looking for us to use the story to map out the complexities that are generally associated with solving public health puzzles – the stakeholders you list and explain here should apply to many of the cases we consider going forward.

Once you have the mass of the gas, calculate the number of moles of CO2 that were produced in the chemical reaction between the vinegar and the 2 Alka-Seltzer® tablets?

For the Mole lab, my team claimed there was 1,992 beans in the large display jar. The estimate was close but still off by 59 beans. The actual amount of beans in the jar was 2,051. To figure out our estimate we used a beaker of beans to experiment with. We first found the tare weight of the beaker, which was 49.912, and the weight of the beaker with the beans, 95.301. Our next step was the weight ten beans of different sizes and find the average of the beans. We found the average weight of the beans to be .47g. After doing this we then subtracted the weight of beaker with the beans from the tare weight to find the weight of the beans. We found the weight of the beans to be 45.389g. After finding the weight of the beans we dived that by he average weight of our ten beans and got 97 beans in our beaker. When we counted our beans in our beaker, we found it to be 105. We then repeated this test but using the tare

The guiding question for the ADI lab was, “Which balanced chemical equation best represents the thermal decomposition of sodium bicarbonate?” The goal of the lab was to determine which one, of the four given, chemical equations best represents how atoms are rearranged during the thermal decomposition of the compound (NaHCO3). The atomic theory states that a chemical reaction is the rearrangement of atoms with no atoms being destroyed and no new atoms being produced during the process. Since that is true it helps to explains The Law of conservation of mass, which states that mass is conserved during a chemical reaction. The goal of this observational lab was achieved by conducting and observing an experiment. Before beginning, some dimensional analysis was done to each of the four given equations (Table 1).

2. When 2.00 g of NaOH were dissolved in 49.0 g water in a calorimeter at 24.0 ˚C, the temperature of the

The mean voltage of the battery terminals while connected to the identification resistors is presented in Figure ‎4 12. These samples have been pulled out from the voltage sensor of the PEB panel. The voltage decreased as expected from 12.53 to 12.5 during first 20 seconds of connection to the

Next the mole ratio would be calculated from the given, this would then be compared to the actual mole ratio. The amount of product can then be calculated using the amount of the limiting reactant used. (UC Davis)

In a test tube, 0.5mL of the sample will be added with 0.5 mL of water and shaken vigorously. Take note for its solubility by parts (0.5mL is one part). Keep adding parts of the solvent until the sample is soluble. If not, add until ten parts of the solvent and determine its solubility. To separate test tubes, water will be replaced with ethanol, chloroform, ether, and acetone as solvents. Same procedures were

Description: This article discusses moles and other skin blemishes. It describes raised moles and raised freckles and explains how to determine if they are harmless or harmful.

Stoichiometry has many uses in the real world. In the chemical industry and in professional scientific experiments, scientists use stoichiometry to save money. Scientists use stoichiometric calculations to determine the amount of a substance they need to purchase for a specific reaction. There are four possible reactions that can occur when sodium bicarbonate thermally decomposes. In this lab, stoichiometry was used to find out which balanced chemical equation out the four best represents the thermal decomposition of sodium bicarbonate.