For this lab, zeolite and magnetized zeolite were synthesized and compared with charcoal to find out with would be the most effective in the sequestering of Procion Red dye. Finding the concentration and absorbance of each zeolite, magnetized zeolite, and charcoal, along with a calibration curve, the best adsorbent is determined. Charcoal was the overall best sequestration of the Procion Red dye, since the adsorbent was highest compared to the others. Introduction Pollution has increased in the environment over the years, so the purpose of this experiment is to find the best adsorbent of chemicals to reduce the pollution.
After copper ions were filtered, approximately 15mL of .5 M was added to the filtrate, which made the mixture acidic. Then, 20 mL was added into the filtrate to raise the pH of the mixture.
Fill each cuvettes with its respective solution. Turn on the spectrophotometer, so it can warm up then calibrate it to 0% absorbance. Put the corresponding extract blank and set the spectrophotometer to 100% transmittance, then calibrate it to 540 nm. Once catechol is added in the cuvettes, make sure the solution is mixed. Place carrot cuvette in the spectrophotometer and record the resulting transmittance.
Jessica Vandeventer 23 March 2016 Quantitative Spectroscope and Visible Light Purpose/Question- The purpose of the lab is to build a diffraction grating spectroscope, and to view different lights. We also are going to draw the light spectra of the various light sources.
The soda water will be stored in 5 different temperatures : 5℃, 15℃, 25℃, 35℃, and 45. The desired temperatures will be achieved by using the water bath and refrigerator. I chose phenolphthalein as the indicator, because it is commonly used for titration and is a weak acid. Phenolphthalein is usually used when the solution is strong base and weak acid. When it is added into an acidic solution, the solution will be colourless; when it is added into an alkaline solution, the solution will turn pink.
With a measure pH of 11.93, calculated pH of 12.8, and a percent error of 7.29%, the results depict experimental errors. Unlike the unbuffered solutions, the buffered solutions are all accurate, with each solution containing a percent error less than 5.0%. This may be due to the fact that solving for buffer solutions is faster, requires less crunching of numbers, and therefore less opportunities for mistakes to
Then, the cuvette that labeled #1 was wiped off with the KimWipe and placed in the single cuvette holder in position 1 in the sample compartment. The position 1 was making sure aligned with the light source. The sample compartment door was closed, and was pressed “auto zero” button on the keypad. Then, after 30 seconds, the absorbance that displayed on the screen was read again and it was 0. The absorbance was read at 0 seconds, at 30 seconds, at 60 seconds, at 90 seconds and at 120 seconds.
2.The color differs with depth or length of the solution because when we are to use the flashlight above the test tubes the color may seem to be darker or more concentrated and if we are to light it from the
The pH of the solution and blank were taken initially before 2M NaOH was added and then taken corresponding to the increment of 2 M NaOH
On the orange ring 5% sodium rhodizonate is added. Red color formation shows the presence of Barium (Ba) and Lead (Pb). On the red color spot HCL is added after drying the swab. If it turns into blue, it confirms the Lead and no change in color confirms the Barium.
What is your secondary color and are you an introvert or extrovert? Why? I am truly an extrovert or maybe an introvert the distinction between two is either side one or the other. So am going to lean towards extrovert, outgoing, friendly, sociable, approachable, the heat of the conversation. I figure blue would be my secondary color, I have a profound need to discover inward peace and truth, to carry on with my life according to my beliefs and convictions without needing to change my firm perspective of life to fulfill others.
3. Introduction: This experiment was performed to determine whether colour has an influence on a person’s mood, blood pressure and pulse rate. People attach different meanings to different colours that may influence their emotions, blood pressure and pulse rate. Different coloured lights; blue, green, red, yellow and white (neutral) were used in a dark room and the participant’s blood pressure and pulse rate was monitored and recorded on an observation sheet to determine if colour has an influence on these variables.
Colorimetric method –instrument and application Introduction: - Colorimeter is device which is used to measure transmittance and absorbance of light passing through a liquid sample. It is a light sensitive device. Principle: - Colorimeter works on the principle of Beer-Lambert’s Law. Beer-Lambert’s Law states that when visible light from a natural or artificial source falls on a colored homogenous medium contained in a glass container, the color of the medium is the complementary color of the light that has been absorbed by the medium.
Practical I: Acid-base equilibrium & pH of solutions Aims/Objectives: 1. To determine the pH range where the indicator changes colour. 2. To identify the suitable indicators for different titrations. 3.
Synopsis This experiment is the determination of Calcium Carbonate (CaCO3) content in toothpaste with the use of back titration while demonstrating quantitative transfer of solids and liquids. A accurately weighed quantity of toothpaste was dissolved in excess volumes of HCl. This solution is then titrated with NaOH to find the volume of the excess HCl. The volume of HCl reacted, which is found by substracting the volume of given HCl with the volume of excess HCl reacted, can be further manipulated with mole fractions to find the mass of CaCO3 and thus the CaCO3 content in toothpastes.
