Chlorine

Stoichiometry- a subject of chemistry, the calculation of quantities in chemical reactions Stoichiometric Calculations- calculations using balanced equations -Chemists use balanced chemical equations as a basis to calculate how much reactant is needed or product is formed in a reaction -A balanced chemical equation can be interpreted in terms of different quantities, including numbers of atoms, molecules, or moles; mass; and volume -Mass and atoms are conserved in every chemical reaction (cules/formula

Once the lab was completed, it was realized that there are different levels of reactivity between all metals. It was also realized that they react to different things such as Calcium reacting to water and the other four metals not reacting to water. To carry out the experiment, there was a set of steps that were followed to get results. All five metals were placed in water in separate test tubes to start with. Calcium was the only one that reacted with water while the rest of the metals didn’t. Those

Stage 1 Chemistry Reactions of Group I and II Elements and Their Compounds. Results: Reactions of Group I Elements Chemical Observations Appearance Colour when Phenolphthalein was added Lithium Before added to the H²O it had already acted with the oxygen creating lithium oxide. When added to the H2O the piece of Lithium starts to bubble (sizzle), produces heat, and dissolves . Looks like a piece of chalk, and is grey/silver in the middle once it has been cut open. Very soft to cut. Turns to Lithium

Patterns: The lower a metal is in its group the faster the reaction it will have with water. This is true for both group 1 and group 2. The metals reacted to form Hydrogen gas and a solution that was alkaline. When going down a group the Electronegativity decreases which results in the element losing their valence electrons easier, making them react more quickly. The group 1 elements had similarities in their appearances, Potassium and Lithium were in a cylinder shape, but sodium was white and had

In the lab before spring break, we had to calculate the percent composition of water in 1 of the hydrated salts. We then weighed in mass for the empty test tube, put the Magnesium Sulfate in the test tube, and measured it before heating. After using a bunsen burner to take the water out of our magnesium sulfate. Following the heating, we let it cooled, and then weighed in mass. My hypothesis is that Magnesium Sulfate would lose the most amount of water because it had the most amount of water while

Thalassotherapy is a hydrotherapeutic treatment meaning it uses external application of water for a health or beauty benefit. It involves using the natural properties of the seawater and ocean-dwelling plants for skin rejuvenation. Having originated in France, thalassotherapy is considered a natural remedy, used with a combination of mineral elements from seawater, skin care products and hot water. It is believed that the sea water used in thalassotherapy is similar in electrolyte concentration

FTIR was used to assess the changes in pectin structure due to sonication. Assignment of peaks was based upon the work of Filippov, [58], the peaks representing various groups within pectin chain were noted. The pectin peaks were similar to those reported by Sato et al.,[59]. The pectin FTIR profile was shown in Fig. 4.The band at 3400cm-1 represented O-H stretching, and the band at 2940cm-1represented C-H stretching of CH2 group. Similar band profile was reported in sweet potato pulp pectin by Takamine

There was a pattern with heat change. When 0.10 grams of CaCl2 was added, the temperature would increase. There seemed to be a negative correlation with how long the second reaction lasted, which would mean the reactions lasted for a shorter time for every 0.10 grams of CaCl2 was added. The color and smell remained constant throughout the whole experiment regardless of how much CaCl2 was added. For every 1 gram of CaCl2 added, the average time decreased by 18.2 seconds. For strengths, the same

The purpose of this lab is to find the densities of three common rocks found in the Earth’s crust, basalt, sandstone, and granite using the provided materials. The prediction was that granite would appear to be the most dense, followed by sandstone, and basalt would be the least dense. The mass (g) and volume (cm³) would be needed to find the density of each of the three rocks. The method, water displacement, would need to be used to find the volume of the three rocks. In this lab, a graduated cylinder

Discussion and Observations During the experiment, the solution was agitated at 350rpm for two flow rates, 80 mL/min and 100 mL/min . As seen in Figure 1, the 100mL/min flow rate solution dropped in pH faster than the solution with a 80 mL/min flow rate. This was due to the solution not being saturated at 80mL/min and able to conduct a chemical reaction. Another important observation was that due to the lack of data, some of the trends had to be predicted for both flow rates. This can be observed