The 1 M NaOH was added to the beakers in doses of 0, 5, 10, 20, 30, and 40 mL, with one dosage in each beaker. The beakers were placed in the 6 staged mixer then stirred at 80 rpm for 2 minutes. The beakers were stirred at 40 rpm for 15 minutes to promote agglomeration. During this time observations on the precipitants were recorded. The mixer was deactivated and the solutions allowed to sit for 30 minutes to allow for settling.
According to this law, P x V = k, where k is a constant. The formula of this law is: P1 x V1 = P2 x V2 (Boyle’s Law) Hypothesis: If the pressure of the gas in the syringe increases putting on the books one by one, the volume of the gas within the syringe will decrease as well. Materials: 4 Books Scale Syringe Meter Methods of testing: First of all, we weighted (in grams) the books and noted in a table. Then, we measured the height, width and the length of the books in inches. After we finished with the measures, we took the syringe holding upright and adding the books one by one.
With an increasing temperature, there would be an increase in volume and the tilt angle would decrease. By looking at the space group of alpha phase of FePO4 which is P3121, it shows that for low temperature form, there will be 3 one screw axis and for the space group of beta phase of FePO4 which is P6422, it shows that for high temperature form, there will be 6 four screw axis. This also explains the unit cell structure of alpha phase of FePO4 being trigonal and changing to hexagonal in the beta phase of
The rate of cooling is immaterial except for some steels which are susceptible to temper brittleness. As the tempering is increased, the martensite of hardened steel passes through stages of tempered martensite and is gradually changed into a structure consisting of spheroids or cementite in a matrix of ferrite, formerly termed as sorbite. These changes are accompanied by a decreasing hardness and increasing toughness. The tempering temperature depends upon the desired properties and the purpose for which the steel is to be used. If considerable hardness is necessary then the tempering temperature needs to be low.
This resulted in a 19.05 percent error. Figure 1 shows the load versus extension and Figure 2 shows the stress strain curve. Figure 1: Load as a Function of Extension of AA 2024T351 Figure 2: Stress as a Function of Strain Graph of AA 2024T351 AA 5052-0 The material properties of alloy AA 5052-0 is shown in Table 1. Table 2: 5052-0 Specimen Experimental
Standard Preparation: 100 mg of standard ascorbic acid was weighed precisely and transferred to a 100 ml volumetric flask, added 70 ml of 0.5% sodium metabisulphite and dissolved by shaking. The volume was made up to the mark with 0.5% sodium metabisulphite for getting a concentration of 1 mg/ml. 2 ml of this solution was taken into another 100 ml volumetric flask and made the volume up to the mark with 0.5% sodium metabisulphite which resulted in concentration of 0.02 mg/ml. The solution was filtered through 0.45 µ nylon syringe filter. Sample Preparation: 2.5 g of sample was weighed accurately and transferred to a 100 ml volumetric flask.
Absorbance versus Time Measurements: The absorbance was set to 0 Abs while the spectrometer was set to ʎmax (from Part A). In Part B, 1.00 ml of the solution was mixed with the Blue dye in the beaker and half-way covered with a cuvette. Concurrently, the Spectronic 20 was blanked with water. The processes detailed above were repeated, each at a time. The absorbance values were recorded for 11 minutes.
After the 30 minutes is done, the tests tubes are then immersed in a 100 degrees Celsius methanol water bath for 15 minutes. Once the samples become frozen, put in a lyophilizer at a temperature of -109 degrees Celsius. The samples are allowed to completely dry. After 6 hours remove from the lyophilizer. Acetonitrile at a PH of 7 (neutral) is added to each of the test tube samples.
The test is based on the principle that the rebound of an elastic mass depends on the hardness of the surface against which the mass impinges. Fig. 8.2 shows the rebound hammer. The spring controlled hammer mass slides on a plunger within a tubular casing. The plunger retracts against a spring when pressed against the concrete surface, and this spring is automatically released when fully tensioned, causing the hammer mass to impact against the concrete through the plunger.
When the results for the first test tube were recorded, then the next solution/mixture was prepared. The second test tube was exactly the same as the first, the only difference being that the SPM was this time set to 35oC. The temperature of the SPM gets increased by 1oC for every test tube solution, until test tube 7 with an SPM temperature of 40oC. After all the absorbencies for the varying temperatures had been recorded – the product concentration of each test tube solution was calculated using the absorbency readings at 10 minutes for each respective test tube mixture. The product concentration was calculated using Beer-Lamberts’ law of A = ECL.