PH indicator

Ali Youssef CHM 111-0A7L Mitra Jahangeri Paper Chromatography Lab Discussion The results of the Paper Chromatography process seem to have aligned with what was expected. When the capillary action on the paper had completed and the chromatograph was finished, the distance that each cation moved (D), as well as the distance that the solvent moved (L), could be properly measured. The distance that the solvent moved ended up being 7.05cm, a number that would represent the constant variable L in…

III. Results Table 2: KHP Vs. NaOH Titration data Trial Initial KHP acid Volume (ml) End KHP acid volume (ml) Volume difference (ml) Volume of NaOH Base Used (ml) 1 7 mL 16 mL 9 mL 10.0 mL 2 16 mL 27.5 mL 11.5 mL 10.0 mL 3 27.5 mL 38.5 mL 11 mL 10.0 mL Table 3: Titration of HCl with NaOH Trial Initial NaOH Volume (ml) End NaOH base volume (ml) Volume difference (ml) Volume of HCl acid Used (ml) 1 4.5 mL 14.5 mL 10 mL 10.0 mL 2 30 mL 41.5 mL 11.5 mL 10.0 mL 3 19 mL 31 mL 12 mL 10.0…

solvent and pH The influence of the solvent on Schiff base ligand L and its metal(II) complexes were studied. The results showed that the optimal solvent for Schiff base ligand L, Co(II), Ni(II) and Cu(II) complexes were CH3CN at λemi =320, 310, 316 and 330 nm, while the optimal solvent for Mn(II) complex was DMF λemi = 312 nm, as shown in Figure 7. The effect pH on the fluorescence intensity of Schiff base ligand L and its metal(II) complexes were investigated between the pH range of…

they make contact with acidic acid. Being that they become extremely reactive with the acidic acid, forming consecutively larger bubbles until the solute (being Sodium bicarbonate) had completely dissolved in the acidic acid. Using the universal indicator it can be observed that the Unknown substance or Sodium bicarbonate had both became a chunky paste, which turns into a dark green colour which signifies that it is a moderately neutral-weak acid. Finally, when comparing the Unknown substance…

The purpose of this experiment is to determine the pH of known substances by use of a pH color indicator of red cabbage and the use of a pH meter. As well as, to observe the pH changes in a substance by adding in more basic of acidic to buffered solutions and unbuffered solutions. This experiment will also will show how to calculate H3O+, OH- and pH by use of known values. In order to do this lab, there are a few key components one needs to know and understand first. A solution is a homogeneous…

strong base with a weak acid, including its equivalence point and half-equivalence point. The following equation demonstrates the dynamic equilibrium achieved when using a weak acid: The Ka value of a weak acid can be found experimentally using a pH meter along with the concept of equivalence point when titrating an acid and a base. One half of the weak acid has been titrated at the half-equivalence point, meaning that the concentration of weak acid [HA] and its conjugate base [A—] are…

higher the pH and the greater difference in colour. A discrepancy in the results is that even though each compound making up DeWitt’s antacid powder had a higher reading pH than the one in Nancy’s Home Remedy, more of DeWitt’s was needed to…

Practical 3: Enzyme Activity (2.5) Research Question: How does the change of pH affect the rate of decomposition of hydrogen peroxide on the enzyme, catalase? Background Information: Enzymes are globular proteins, which are synthesised by cells in order to perform specific functions. These act as catalysts in chemical reactions and are considered a major factor in an organism as these reaction rates are required to be shortened in order to support life. Catalase is one of the most…

pH Levels: The pH level system is the measure of the concentration of hydrogen ions in solutions. Subsequently, if there is a higher concentration then the pH is low meaning it’s acidic and if there’s a lower concentration then there’s a high pH levels meaning it’s basic. pH levels affect the quality of water because it affects the toxicity and the solubility of chemical substances and heavy metals. This causes the concentration of hydrogen ions in the water to change from the normal pH range…

an indicator in this reaction because it changes color when a solution reaches a pH of around eight, or in other words the endpoint of a solution. It also allows us to see a physical change, thus resulting in a more accurate measure of how much was titrated. Citric acid is a weak acid, making it best titrated by using a strong base, such as sodium hydroxide. The combination of a weak acid and a strong base would result in an endpoint that corresponds to the range of phenolphthalein indicator…