Solubility equilibrium

Iron determination From accurately carrying out the iron determination experiment, this meant that we could then do some calculations to work out the exact concentration of iron in the tablet and the exact amount which is made up of iron, these are stated in my conclusion. We carried out this practical safely when rinsing and using the glassware as there was no breakages or injuries caused by the glassware. Whilst handling the chemicals we wore disposable gloves, goggles and lab coats at all…

different pigments relative to original line where you put the spot of leaf extract. (Bazil) Which pigment is the most soluble and which is the least soluble in petroleum ether? Each pigment has a different solubility in the solvent due to their unique molecular structures and differing polarities. Solubility plays in an important role in determining unknown pigments in a sample. In the case of the lab, the most soluble pigment should have the highest Rf value and should have travelled the…

The purpose of this lab was to identify the amount of salt needed in the water to “flink”, the point at which an object sinks or floats, the golf ball in a salt solution. Flinking occurs when the object is neither sinking or floating, it appears as if it is suspended in the middle of the solution. To flink an object, the object’s density has to have the same as the density of the solution that it is placed into. To achieve the same density of both the salt solution and golf ball, manipulation of…

Ammonia is a compound composed of nitrogen and hydrogen, having the formula NH3. The ammonia molecule is formed by sp3 orbitals as it has a tetrahedral geometry and a trigonal pyramidal shape. Ammonia has an experimentally determined bond angle of 106.7°, and an a bond length of 101.7 pm. The nitrogen atom in the molecule has a lone electron pair, which gives the molecule a dipole moment and polarity. Ammonia’s lone electron pair makes NH3 a base, a proton acceptor, and gives it the ability to…

Every substance reacts with force. Whether it breaks, splashes, or holds together. The science behind this experiment is the suspension. The suspension is the mixture of two substances. Where one is finely divided and dispersed in the other(SteveSpanglerScience,2015). The purpose of this experiment is to analyze the different states of viscosity, varying on the force applies to the solution. This mixture has two different states when force is being applied. When touched slowly, it is simple to…

4.2.3.5. Antioxidant assays in gastric tissue homogenate 4.2.3.5.1. Catalase activity Catalase activity in the gastric tissue was measured according to the procedures of Sinha (1972). One ml of homogenate solution was taken and mixed with 5 ml of phosphate buffer of pH 7.4. To this 4 ml of 0.2 M H2O2 was added and time noted. Exactly after 180 seconds of adding H2O2, a set of 1ml of reaction mixture from the above was taken and 2 ml dichromate acetic acid was added. It was then kept in a boiling…

Topical ointments Introduction: An ointment is semi solid topical preparation applied to external application with rubbing effect. It may be a vehicle or media for a drug or it may serve like a protective or emollient. Ointments show plastic flow characteristics. When the ointment is applied it is definite yield value and the resistant to flow drops as the applications to the skin is continued. Body: • Uses : There are two types of ointments: A- Medicated: used to treat different…

The experiment came out successful based on the results. We did encounter one problem with one of the solutions. The colorimeter results for Biscayne Bay Pond Water didn’t come out right; so we had to dilute the solution to get the result. Analysis: First turn on the colorimeter and select “ALL TESTS” from the testing menu. Press “AMMONIA-N H” from the menu. Fill one tube with 10 ml of DI water, and three tubes with 10 ml of bay water, pond water, and parking lot puddle water. We added a…

You have recently reached out to our firm Nittany Chemical Analysis to assist you in assigning the correct empirical formula for Manganese ( ) Chloride. On the 14th of September 2015, we carried out an experiment and we were able to accurately determine that manganese had an oxidation number of III. From this finding we are confident that the empirical formula for the compound in question is Manganese (III) Chloride. Throughout the entire course of this letter, we will further explain our…

N-Vinyl pyrrolidone (NVP) and its copolymers attracting much attention and have been widely investigated for applications in different field due to its low toxicity, biocompatibility and good film forming (Hemalatha et al. 2014; Anasuya; Lee et al. 2007). The amide group in NVP is highly polar, which confirms it’s hydrophilic. NVP has been copolymerized with various monomers because the amide group has high affinity for many large and small molecules that are known to be good hydrogen-bond…