Hydrochloric acid

(Representing the results obtained from the experiment) Known Acid HCl 1 mol dm-3 (± 0.100) Unknown Acid HCl 0.76 mol dm-3 (± 0.100) Highest Temperature (Time) 28.5 (190s) 28.6 (235s) Lowest Temperature (Time) 22.9 (55s) 22.9 (55s) Sample Calculation for the Unknown Concentration C1V1 = C2V2 1 (190 - 505) = C2 (235 - 505) 1 28.0 = C2 37.0 C2 = 2837 C2 = 0.760 mol dm-3 (±0.0500) Sample Calculation for the amount of mole in Unknown Acid Mole = Concentration Volume Mole = 0.760…

analysis is a method used to determine the mass or concentration of a substance by measuring a change in mass. To determine the concentration of the sulfate, the precipitation of Barium sulfate is done first by adding the sulfate solution with hydrochloric acid, then heating while stirring it. Next is the washing and filtration of the Barium Sulfate precipitate, using a vacuum pump and a crucible. Lastly, is the drying and weighing of the precipitate by heating the crucible in the oven and…

Alkalinity is a measure of the ability of a water to resist changes in pH. Alkalinity in water is due to the presence of weak acid systems that consume by hydrogen ion produced by other reactions, allowing chemical or biological activities to take place within a water without changing the pH (1). In this way the alkalinity protects aquatic life. The measured value may vary considerably with the end-point pH used. Alkalinity is a measure of an aggregate property of water and can be interpreted…

it is considered to be activating is because of the electron pairs on the ether molecule. Furthermore, the electrons activate the benzene ring which makes it more reactive. On the other hand, if benzoic acid replaced anisole in the experiment, it would act as a deactivating group. Carboxylic acid pulls electrons from the benzene ring acting as a withdrawing group which causes a slower reaction with the increase of stability and decrease in reactivity due to resonance. The electrophile is…

Kinetic investigation and the Arrhenius plot The degradation of SAC in acidic, basic and oxidative mediums at different HCl (0.01, 0.05 and 0.1 M, keeping temperature 90 ºC), NaOH (0.005, 0.01 and 0.05 M, keeping temperature 40 ºC) and H2O2 (5%, 10% and 15%, keeping temperature 90 ºC) strengths was studied. Also SAC degradation was studied as a function of temperature in acidic (30, 60, 70, 90ºC and room temperature, keeping HCl strength 0.1M), basic (40, 65, 90ºC and room temperature, keeping…

this lab, benzoic acid, benzocaine, and 9-fulorenone are isolated from a three-component mixture by using the acid-base extraction and other following types of various extraction techniques. An acid-base reaction is utilized in order to isolate the individual species from the mixture. First, in isolating the base benzocaine, proton transfers occurred via reaction with hydrochloric acid, which led to a significant shift in the polarity of the said compound, although the conjugate acid of…

Using qualitative analysis, two cations in an unknown solution was identified. After repeated mixing, centrifugation, and decanting, lead was confirmed in Part A and barium in Part B. In Part C, different colored flames of metal species were observed using cation flame tests. Formula unit, total ionic, and net ionic equations were then composed for the identified cations. If the experiment were to be repeated, step 13 could be ommitted as barium was already confirmed in step 12 with the…

Hopkins University. 2.2.2 SYNTHESIS OF SILICA GEL 2.2.2. a) USING KAOLIN BY-PRODUCT The synthesis process (D. Brahmia 2014) was carried out in two steps namely, (1)Metasilicate sol preparation and (2) Metasilicate destabilization with acid. In the first step, a mixture of sodium carbonate and sand were heated to 1000°C to form silicate. Sodium silicate formed in this study was prepared with different molar ratios, n, ranging from 1 to 4 as shown in Equation (2.1). The result…

antacids are the strongest. During the experiment there will be several test tubes filled with a “natural acid-base indicator” (Fleishman). Then, antacids will be dropped into each test tube. This will answer the question, “Which antacids are most potent in changing the color of the acidic solution?” The strength of an acid or base is designated by its pH on a scale of 0 to 14 (Fleishman). A pH of 7 is thought of…

Acid and Base Theories Final Paper In the world of science, there are three main theories for acids and bases. Those three theories are the Arrhenius theory, the Bronsted-Lowry theory, and the Lewis theory. An Arrhenius acid is defined as a substance that increases the concentration of hydronium ions in aqueous solution and an Arrhenius base is defined as a substance that increases the concentration of hydroxide ions in aqueous solutions. The definition of a Bronsted-Lowry acid is that it is a…