Unknown Mixture Lab Report

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 goal of this lab was to determine the amount of grams of sodium bicarbonate (NaHCO3) required to produce enough CO2 gas to completely fill the lab and also how many Alka-Seltzer tablets that would equate to. This was done by collecting CO2 gas by inverting a buret and submerging it under water in order to calculate the volume of CO2 released from a fragment of Alka-Seltzer tablet. The main component of Alka-Seltzer is sodium bicarbonate, used to neutralize excess stomach acid during illness through the following reaction that generates CO2:

My unknown organism #6 is Morganella morganii, which is a gram-negative bacillus rods commonly found in the environment and also in the intestinal tracts of humans, mammals, and reptiles as a normal flora. (3, 5) This bacterium Morganella morganii, was first discovered in the 1906 by a British bacteriologist named H. de R. Morgan. (2) Despite its wide distribution, it is an uncommon cause of community-acquired infection and is most often encountered inpostoperative and other nosocomial settings. (2, 3) Morganella morganii infections respond well to appropriate antibiotic therapy; however, its

The purpose of this experiment was to mix Alka-Seltzer with Hydrochloric acid in order to analyze Sodium Bicarbonate as an active ingredient in the Alka-Seltzer. The mixture will contain hydrochloric acid to only see the composition of Sodium Bicarbonate in the tablet once it reacts. The amount that reacted allowed us to determine how much of it is present in the tablet. The amount of sodium bicarbonate will be measure by using the ideal gas law PV=nRT. The experiment will be conducted in the lab, therefore we are going to use room temperature which ranges from 15 to 26 degrees celsius. At room temperature pressure ranges from 12.8 to 25.0 millimeters mercury according to its corresponding room temperature.In the ideal gas equation R is 0.08206latm/mol k which is a constant. Once we have those values we can calculates the number of moles that reacted in the mixture by solving for the missing value. With the number of moles we are able to find the mass in grams which is what will potentially tell us the composition of Sodium Bicarbonate in a tablet of Alka-Seltzer.

The objective of the experiment was to observe different reactions with different chemicals. The experiments emphasized on the chemical changes occurring in acids and bases as well as color changes and bubble formations. The experiments allowed for a better understanding of the undergoing chemical changes in mixtures. Some mixtures instantly changed colors while others were transparent or foggy. Some mixtures produced thick color that created solids called precipitates. Mixtures KI + Pb(NO3)2 and NaOH + AgNO3 both produce noticeable precipitates after a while. It was interesting to see the different acidic and base reactions like the fuchsia color formation in NaOH + phenolphthalein.

Bacteria are ubiquitous; they can be found on the skin, in the soil, and inside the body. Because of the very nature of this ubiquity, it is important to be able to determine between different strains of bacteria. An example of this is determining the causative agent for a disease so that the patient will be treated with the appropriate antibiotics. It may be important to determine the bacteria in a certain region, because like with enteric bacteria, it is normal to find them in the digestive tract as they are in a symbiotic relationship with our bodies in this area; however, they also cause opportunistic infections in places outside of the digestive tract to our detriment, such as with a urinary tract infection. Some strains of bacteria are common to nosocomial infections, and identifying these bacteria as such helps create the guidelines for healthcare workers in antiseptic technique. All of the morphology and characteristics of each strain of bacteria help us to better understand the role of bacteria in the body as well as helps us understand how they can cause illness, and what treatment regimen to set in place. In lab this semester, a sample of unknown

By adding acid to the baking soda, it caused the substance to form bubbles and release gas. More drops of HCl were added until the bubbling

Alka-seltzer Lab Report Statement of the Problem: The question of this lab was to find the optimum amount of Alka-Seltzer and water to achieve the highest launch possible. As Alka-Seltzer can dissolve in H2O and release CO2g (carbon dioxide gas), the gas is trapped inside the container and starts to gain pressure. This is the combination produces Sodium Bicarbonate which releases CO2g and other products. When the pressure in the container reaches maximum pressure, the lid will pop off releasing the gas and making it fly upwards.

The purpose of this experiment was to classify unknown solids based on their type of chemical bonds by investigating their properties. By using data, Unknown 1 was classified as a metallic. This was because it appeared a shiny copper color, had a very high conductivity as a solid, had a high melting point, and was malleable. Unknown 2 was classified as a nonpolar covalent bond. This was because it had no conductivity as a solid and low conductivity in water.

An unknown was given to our group from the professor. The unknown was in nutrient broth, the group received unknown number 3. And the task was to identify the unknown and try to make an educated guess, and identify the unknown #3.

In my lab,we observed various chemicals and their reaction to water.Their reactions were mostly that they just dissolved with the water,causing the water to turn white.However, some of their reactions were more interesting.One of the more interesting reactions was baking soda.At first the baking soda was chunky yet power like.When water was added however, it turned the water white, and caused it caused the water to bubble.The bubbles started off small, but soon grew in size. After the bubbles died down, there was a small sizzle, and the bubbles sank to the bottom of the specimen tray.The baking soda and a really cool reaction, and I must admit, I popped some of the bubbles with the paperclip. Something that did go wrong was that one of my

Table 1: Observations from reactions between baking soda and vinegar, and baking soda and calcium chloride.

The objective of this experiment was to prepare sodium chloride. When the sodium bicarbonate and 10% hydrochloric acid were combined, a fizzing sound and numerous bubbles occurred. This continued until about seventy drops of hydrochloric acid was added to the beaker containing sodium bicarbonate which then a clear liquid was produced. This reaction created sodium chloride which was found by heating the beaker, evaporating everything besides the HCl. As the evaporation took place, condensation occurred on the inside and steam rose from the beaker. The leftover sodium chloride was colorless and looked like small, salt like crystals.

In this lab experiment, an unknown metal carbonate went through a chemical reaction with 1.0 M barium chloride, forming products of barium carbonate and an alkali metal chloride. The unknown alkali metal carbonate also went through a chemical reaction with 1 M hydrochloric acid, forming an alkali metal chloride, with liquid water, and carbon dioxide gas as products. A final flame test was done to reveal what the unknown alkali metal was. Once all molar masses were calculated, the masses were extremely varied, ranging from 37.061 grams per mol to 133.110 grams per mol. When the flame test was performed, yellow-orange colored flames appeared, revealing that the unknown alkali metal carbonate was sodium carbonate.

We had to investigate many chemicals. The first one was Sodium bicarbonate. We tested the chemical and the results were that the form was amorphous, white, opaque, and odourless. We did two different tests with water and acid. We first added 8-10 drops of water to the sample and it was soluble. We then added 3 drops of acid to see the reaction. It started bubbling up and it was soluble.