Trigonometry Lab

If excess sodium bicarbonate increases the pH of the water, it shows that excess sodium bicarbonate increases the pH of the blood and if excess sodium bicarbonate decreases the pH of the water, it shows that excess sodium bicarbonate decreases the pH of the blood. 31. Add dry ice (solid CO2) to distilled water. 32. Measure pH of the solution containing distilled water and dry ice.

In the next steps the density of water between 30-40 °C, 40-50 °C and 50-60 °C was measured. Then our results ρ vs T and also density vs temperature values given in the Steam Tables were plotted on the same graph in order to compare. In the second part the density of water was measured by density bottle. The densities obtained from the experiment are 995, 992.5, 991, 990 kg/m3 for the first part and

MDA level was determined by thiobarbituric acid reactive substances (TBARS) in serum, based on the reaction between MDA and TBARS. Standard Malondialdehyde solution in 5 mL of volume was processed along with test samples. 1.5 mL of 0.8% of TBA was added to 1 mL of the serum sample. Then 0.4 mL of 8.1% sodium dodecyl sulphate and 1.5 mL of acetic acid was added. The mixture was finally made upto 5 mL with distilled water and placed in hot water bath at 95ºC for 1 h. After cooling, 1 mL of distilled water and 5 mL of the mixture of n-butanol and pyridine (15:1, v/v) was added.

5 mL of 3M sodium hydroxide, 5 mL of de-ionized water, and 15 mL of hexane were added to the reaction flask and stirred. The mixture was transferred to a separatory funnel, separated into an organic layer and water layer, and then drained. The water layer was washed twice with 10 mL of hexane. The organic layer was dried

When looking at the results, one can see that an increase in the acidic salt, NH4Cl, increases the pH so in theory, the lactated ringer injections need to counteract this. This then proves that the IV injections of lactated ringers in excess will cause alkalosis. One needs to take caution when administering this as an increase in lactate in the body is not

Collisions increase or become more violent between molecules at higher temperatures or decrease as the temperature is lowered. Some factors that influence the speed of a chemical reaction are: (1) surface area of starting reactants; (2) concentration of reactants; (3) temperatures. The particle theory states that a solute dissolved takes place at the surface of the solvent and the larger the surface area of the particle the longer it will take to dissolve. The smaller the area the faster it will

In addition, phenolphthalein was added as an indicator. The aliquots were titrated against sodium hydroxide (NaOH) solution until end point was reached, after which volume of NaOH consumed was recorded. The value of the rate constant, k, obtained was 0.0002 s-1. The experiment was then repeated with 40/60 V/V isopropanol/water mixture and a larger value of k = 0.0007 s-1 was obtained. We concluded that the rate of hydrolysis of (CH3)3CCl is directly proportional to water content in the solvent mixture.

Raising the concentration of the NaCl solution, it is also increased the osmolarity of the solution becoming less hypotonic compared to the egg. This is why it was observed a decrease in mass change with the increase of concentration of the NaCl solution. It can be stated that the osmolarity of the egg is higher than the osmolarity of a 15% NaCl solution. We will need higher concentrations of the NaCl solution in order to assess

The product (Cu(OH)2) was unstable and could reform Cu2+ and OH- ions due to its high solubility. This result can cause difficulties on separating Cu from the other metals in the AMD. Therefore, additional treatment, such as sulfidization, is required to prevent the occurrence of the reformation process

In this lab, Alkaline water was placed in a test tube that was filled with starch and amylase, which is an enzyme. Another test tube was filled with starch and amylase as well, but instead of Alkaline water it was filled with distilled water. This would help see if the Alkaline water would have a positive test, like the distilled water, or have a negative test, meaning the enzymes did not break down the starch. It would also see if the Alkaline water was more effective than regular water by breaking down the enzymes at a faster rate. To simulate the average body temperature, a glass of water was heated up to be around 98.6 degrees fahrenheit.