Molar Composition Lab Report

In the ADI Molarity Lab, the primary tasks was to use different values of moles of solute, volume of solvent, and molarity to find the mathematical relationships between them. To find these relationships, our group had to change the quantities of each of the variables and visually observe the molarity within the solution. For instance when using Cobalt (II) Nitrate to find the relationship between volume of the solution and the molarity of the solution; the group kept the amount of moles of the solute at a constant of 1.00 moles because if it would have changed it would have caused inaccurate data. We first set the volume of the solution to 0.2 liters. The molarity of the solution was 5.00 mol/L. Then we changed the volume of the solution

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 purpose of the experiment was to synthesize alum from aluminum foil, using a series of chemical reactions. The synthesis was achieved using sulfuric acid, potassium hydroxide, water, and aluminum. The synthesized alum was then used in a number of tests to test for the presence of ions in the compound (potassium, aluminum, sulfate, and water). The left over alum was then used to employ various techniques for crystal growth.

In the lab Which Is Your Metal, we attempted to identify an unknown metal by determining its specific heat capacity. We began by choosing a sample of metal, finding its mass, and describing it. We found the temperature of our boiling water. Then, we calculated the volume and temperature of the water in our calorimeter before and after the experiment. Through these calculations, we determined that the heat transferred to the calorimeter water from the hot metal was 595.65J (6.0x10²J with proper significant figures). After finding the heat transferred, we were able to calculate the specific heat capacity and match it to the correct metal. Our specific heat capacity came to 0.26J/g°C, which was closest to the

Add 310 μl buffer AVE to the tube containing 310 μg-lyophilized carrier RNA to obtain solution of 1 μg/μl. Dissolve the carrier RNA thoroughly, divide it into conveniently sized aliquots, and store it at –20°C. Do not freeze–thaw the aliquots of carrier RNA more than 3 times.

Materials: Mg ribbon, thermometer, barometer, 6M HCL, eudiometer(Acid), 50 ml beaker, 400 ml beaker, cotton thread, base #7, pipet, ring stand, buret clamp, funnel, cork(hole through center vertically), cylinder full of water

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.

The magnitude of a star is simply how bright the star is. The brightest stars were of first magnitude, however, the dullest were of sixth magnitude. The simple scale of magnitude was made popular by Ptolemy, but is thought to have started with Hipparchus. The scale is sometimes considered confusing since the brighter the star is, the smaller the magnitude it has.

A Molisch's test requires mixing the test solution with Molisch's reagent. One prepares this reagent by dissolving alpha-naphthol in 95 percent ethyl alcohol. After mixing the test solution and reagent, the individual adds 2 milliliters of the test solution to a test tube and pours 2 milliliters of sulfuric acid down the side of the slanted test tube without mixing. The mineral acid is very heavy, so it forms a bottom layer.

Twist and fold one end of the 15-cm copper wire and insert the magnesium ribbon through it. Bend the magnesium ribbon around the copper wire to

Abstract: In this lab report two unknown substances will be tested. The tests performed were looking for the presence of the main biomolecules, Carbohydrates, Lipids, and Proteins. The tests used will be used in the Lab report are; The Benedicts test to test for sugars, the Iodine test for coiled or non-coiled carbs, The Grease-spot test for lipids, and the Biuret test for proteins. Tests show that both substances had different responses to the Benedicts test. Both substances shared the same response to the Iodine test. In the Grease-spot test both showed the same. In the Biuret test the unknown substances resulted differently from each other.

Only outer shell electrons are involved with chemical change, and indicate the reactivity of an atom.

In 1869, the Russian chemist Dmitry Mendeleyev organized the elements in a table according to their atomic weights. Dmitry Mendeleyev organized the elements based off their physical and chemical properties. In the experiment, the similarities and differences in the properties of the representative elements in Group I, II, III, AND IV is observed. The trend in the acidity or the basicity of the elements in the third period of the periodic table are observed using H2O and HCl. The purpose of the lab is to explore the reactivity trends of metals, halogens and third party elements in groups and periods of the periodic table.

since the end of the 19th century, hydrothermal synthesis of inorganic materials has been carried out. It is defined as the precipitation of these materials from aqueous solutions at temperatures above the boiling point and at pressures greater than ambient pressure. This method is actually environmentally because it does not require any organics or additional processing such as calcinations. That is the reason why it has been widely used for synthesis of a wide range of materials especially metal oxides such as hematite and quartz. Hydrothermal synthesis of quartz was demonstrated several decades ago and now currently used commercially. The traditional hydrothermal synthesis method is carried out in an autoclave type reactor where an aqueous solution is heated slowly to a certain temperature and then aged for several hours or days. In the case of the formation of metal oxides, hydrothermal synthesis method is generally involve two reactions which are hydrolysis of the meal salts followed by dehydration.

In many cases, the three reaction types (hydrolysis, condensation, or aggregation) occur simultaneously (and are difficult to control individually), so slight variation in experimental conditions result in altered particle morphologies and is a serious concern regarding the reproducibility of a synthesis. Furthermore, the as-synthesized metal oxides are often amorphous, and it is difficult to retain full control over the crystallization process. However, nonaqueous (or nonhydrolytic) sol-gel processes in organic solvents under exclusion of water molecules are able to beat some of the major limitations of aqueous systems.