The balanced molecular equation is: Na2S(aq) + ZnCl2(aq) = ZnS(s) +2NaCl(aq). The ionic and net ionic equations are: Ionic: 2Na(aq) + S2(aq) + Zn2(aq) + 2Cl(aq) ZnS(s) +2Na(aq) + 2Cl(aq), and net ionic: Zn2(aq) + S2 (aq)+ ZnS(s). Chemical reaction occurred from the ammonium dichromate(Decomposition) was exothermic reactions. In a double displacement reaction two compounds exchange bonds or ions in order to form different compounds. An example of a double displacement reaction occurred between zinc chloride and sodium sulfide to form zinc sulfide and sodium chloride.
Experiment 2 Report Scaffold (Substitution Reactions, Purification, and Identification) Purpose/Introduction 1. A Sn2 reaction was conducted; this involved benzyl bromide, sodium hydroxide, an unknown compound and ethanol through reflux technique, mel-temp recordings, recrystallization, and analysis of TLC plates. 2. There was one unknown compound in the reaction that was later discovered after a series of techniques described above. 3.
Sodium Bicarbonate mixed with Hydrochloric acid. The chemical reaction observed showed that there was fizzing and bubbling, this is evidence that a new gas was being produced. This new gas, CO2 was generated from the reaction. After the fizzing stopped a liquid was leftover leading me to conclude the liquid leftover leading me to conclude the liquid leftover was the NaCl and H2O 4. You found a sample of a solution that has a faint odor resembling vinegar (an acid).
In the reaction between potassium iodide (KI), hydrogen peroxide, sodium thiosulfate (Na2S2O3) under acidic condition. Apparatus: The apparatus used in this experiment are as follow: 50cm3 measuring cylinder 25cm3 measuring cylinder 100cm3 beaker White
Next test, inoculation of a urea broth and is used to determine if unknown #398 contains urease that hydrolyzes urea. Last test, inoculation of phenylalanine agar is used to determine if phenylalanine deaminase oxidizes phenylalanine into phenylpyruvic acid and ammonia. Sixth test, is a Multiple Test Media used to determine the physiological characteristics of unknown #398. First test, Inoculation of Kligler 's Iron agar was used to determine the production of hydrogen sulfide from cysteine and fermentation of glucose and lactose. Last test, inoculation of litmus milk is used to determine the fermentation of lactose, casein, lactalbumin, and
In the sodium iodide test, the alkyl halide is added to sodium iodide in acetone. In this test, primary halides precipitate the fastest while secondary halides need to be heated in order for a reaction to occur. Comparison of the rates of precipitation of the obtained product to standard 1° and 2° bromide solutions will show whether the product is a primary or secondary
Salicylic acid is not used like it used to be because of the irritable effects it has on the stomach. The form of Salicylic acid used today is known as “Aspirin” which is far less irritating to the stomach. Aspirin is a synthetic pharmaceutical drug that is non-steroidal anti-inflammatory. The physical appearance of Aspirin is a
Strong bases with higher pKa are able to deprotonate molecules that have lower pKa values such as acids to produce a salt and water. The conjugate acid of the strong base must be weaker than the acid it is trying to deprotonate. Weaker bases on the other hand which have lower pKa values are unable to deprotonate the same molecule as the strong base. Thus, NaHCO3 which has a pKa value of 6.4 is unable to deprotonate the phenol which has a higher pKa of 10.2. So, the HCO3- will not take the H+ from the phenol and no salt will be
Determination of the molar mass of a chosen compound/element Fran Jurinec 1.M Introduction Molar mass is a physical property of a chemical element or substance which shows the mass per amount of substance. My task is to determine the molar mass of a product substance from one of the following equations: a. Zn(s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) b. CaCO3 (s) + 2HCl(aq) → CaCl2 (aq) + CO2 (g) + H2O(l) c. Na2SO3 (aq) + 2 HCl (aq) → 2NaCl (aq) + S (s) + SO2 (g) For my experiment, I chose to determine the molar mass of SO2, which is a product from the 2nd equation. For this experiment I have determined the independent, dependent and controlled variables and they are: Independent variables: Volume of HCl used [ V(HCl) ] Dependent:
Camphor is a ketone. In the experiment we also need to determine the purity of the product. Ketones can be oxidized from a secondary alcohol using a strong oxidizing agent such as chromic acid. However, there exists chromium compounds that are known to be corrosive and generally harmful and pose as a legal disposal issue due to their harmful nature. Chromic acid cleanly oxidizes secondary alcohols to ketones using acetones as solvent and the product isolation is simple.
What happens during this stage of the experiment showing visual change and acidic reaction that is becoming weaker as the molecules are deprotonated to become equal parts within the solution. So by finding the molar ratios we learned that acid to base are 1:1 when equally balance or concentrated. So therefore concentrations at stoichiometric end point can be found by plugging in the values to formulate a dilution equation as seen above. When expressing calculations I found when doing the Titration of an Unknown Acid I discovered that with .1 mL of Sodium Hydroxide and at least 10 mL Anthocyanin as/or acetic solution will produce an average molarity of 0.9 or higher according to my