room temperature and was white. It was soluble in water, as indicated by Table 1. Of the list of possible known compounds, the unknown could not be CaCO3 or MgCO3 because neither one of those compounds are soluble in water, but it could have been any salt as the compound is ionic. From there, a conductivity test proved that the unknown compound conducted 1.1 volts of electricity, meaning the compound contained both positively and negatively charged ions that move around to conduct the electricity.
Selena Tran Chem 4A Lab Section 401 Formal Lab Report 1 09/21/2017 Gravimetric Analysis of Sulfate Formal Lab Report Abstract: Three measures of unknown sulfate salt was measured and placed into three beakers with water, Hydrochloric acid, and Barium Chloride. The solutions were heated until Barium Sulfate precipitated and the solutions were filtered through ashless filter papers to collect the precipitate. The filter papers were combusted until only the BaSO4 remained, and the precipitates were
too much water with a high salt content, this process is similar to plants, however it more so acts as a poison, killing the plant. However this salty water can be made drinkable and usable through means of desalination methods in order to lower the salt content of the water and in return make it safe to drink and safe for agricultural us (ie. irrigation). In order for water to be physically safe to be drinkable by humans or for use of irrigation etc., it must have a salt content of less than 0.05%
Abstract The process of gravimetric analysis was successfully illustrated through a precipitation reaction using NaCl and AgNO3. These reactants are found in abundance in a laboratory and aimed to produce the precipitate silver chloride (AgCl). This slightly soluble substance is effortlessly precipitated from a single reagent. Silver Nitrate is also not too hard to filter, dry and measure the weight. Introduction An ionic compound is formed when two ions in space of the opposite charges come together
properties of the unknown. Understanding the chemical properties of a known substance aids one’s understanding of the unknown based on comparative analysis of the results of the tests. In reference to the analysis of anions, Table 1 shows that a precipitate was formed when our unknown was combined with HNO3 and AgNO3, thus indicating the presence of a chloride ion. Because our unknown did not form a precipitate due to HCl and BaCl2, separate, effervesce, or smell, we concluded that neither sulfate, nitrate
In an educational setting, it is generally true that the concentrations of the ions to be identified are all approximately 0.01 M in an aqueous solution. The 'semimicro' level of qualitative analysis employs methods used to detect 1-2 mg of an ion in 5 mL of solution. First, ions are removed in groups from the initial aqueous solution. After each group has been separated, then testing is conducted for the individual ions in each group. Here
identification (Favretto, 2013). Other than mass spectroscopy, other methods for the identification of unknown inorganic compounds come from other tests, such as the flame test, solubility test, conductivity test, and pH test. There are also tests using gravimetric analysis,
Theory Gravimetric analysis is a technique that can determine the amount of an analyte through the measurement of mass. Essentially, in a pure compound, the mass of an ion can be determined. This can then be used to calculate the mass percent of this ion in an impure compound of a known quantity (Wired Chemist). This method of quantitative chemical analysis is demonstrated in the determination of the chloride content in an unknown compound. The reaction equation of chloride ion precipitation by
hydroxide solution then added to apply a protocol and the solution was heated at 140 °C for 1 h and at 180 °C for 4 h. The alkaline hydrolysis of Gdcl3 should be carried out in substoichiometric conditions, too. 3.1.2 Enlargement of Core Gadolinium chloride salt will be placed in 150 mL of DEG at 60 °C under vigorous stirring overnight. A solution containing nanoparticles then added to play the role of nucleation sites. Sodium hydroxide solution is added and the solution is heated at 140 °C for 1 h and
and carrydown of COD matter from heterogenous samples. Ammonia and its derivatives, in the waste or generated from nitrogen-containing organic matter, are not oxidized. However, elemental chlorine reacts with these compounds. Hence, corrections for chloride interferences are difficult. Nitrite (NO2–) exerts a COD of 1.1 mg O2/mg NO2–-N. Because concentrations of NO2– in waters rarely exceed 1 or 2 mg NO2–-N/L, the interference is considered insignificant and usually is ignored. To eliminate a significant