Airspeed indicator

The purpose of the experiment was to determine how a buffer works and how to use an acid-base indicator. The way a buffer works was determined by observing the changes in pH of solutions of different concentrations weak acids and their conjugate bases to determine how a buffer affects the pH change. The solution of 10 mL of 0.20 M CH3COOH and 10 mL of 0.20 M CH3COONa had slighter changes in pH than the solution of 10 mL of 0.0020 M CH3COOH and 10 mL of 0.0020 M CH3COONa. Both of these solutions were

Thirteen adult subjects (five male and eight female) 19-23 years of age were gathered to perform a forced expiratory volume (FVC) maneuver and have pulmonary testing conducted during increasing intensity exercise. Respiratory measures for tidal flow volume loops were measured using pulmonary spirometry. For this experiment, an MC-TA-200V Metabolic Cart was used to collect data. The equipment was setup as follows: a sterilized mouthpiece was attached to a filter configured with one way valves to

From this lab experiment, I can conclude that the red cabbage solution is an effective indicator for the acidic, basic and neutral chemical compounds. I learned that the universal indicator is also a good solution for the three types of compounds. The colours are different depending on what substance you are testing. The colours that we discovered in the pH scale are pink, red or orange. As for bases the colour was either light or dark green sometimes yellow. The colours for neutral, were violet

with a yellow halo around colony from the acid produced (staphylococcal species). MSA is composed of enzymatic digest of casein and animal tissue (nitrogen, vitamin carbon source), D mannitol (carbohydrate), NaCl (7.5%, halophiles), phenol red (indicator pH 6.8 turns yellow), and agar (coagulate), with a final pH of 7.4. Unknown 6 did not grow since it is gram negative, and cannot tolerate the high salt concentration. Also there was no yellow halo since the colony did not survive therefore could

The five reagents that were used in this lab were Ninhydrin, Biuret, Orcinol, I2KI, and Nile blue. Ninhydrin in solution will react with amino acids producing a blue product. In the absence of amino acids, nope color develops. this test is both qualitative and quantitative. the development of a blue color indicates the presence or absence of amino acids and the intensity of that color reflects the concentration of amino acids present in the sample being tested. the next reagent that was used was

acidic is 2143. Dichloroacetic acid is the second strongest in those 4 acids; this suggests that unknown acid 3 is dichloroacetic acid. Discussion question: Phenolphthalein is an indicator commonly used in acid-base titration. Explain how the equivalence point of acid-base reaction can be determined using this indicator. State relevant reactions, pH ranges and qualitative

After recording the volume of the NaOH. Obtain the 7-UP in an Erlenmeyer flask at about 40.0 mL also containing 60.0 mL of water and 5 drops of indicator drops. After each trial repeat these steps. Add the NaOH solution to the flask in 2 mL increments until a faint pink color appears and remains. This is the endpoint of the titration. The titrant volume is the initial volume subtracted from the final

as acid base indicators. We found that the equivalence point of the titration of hydrochloric acid with sodium hydroxide was not within the ph range of phenolphthalein's color range. The titration of acetic acid with sodium hydroxide resulted in an equivalence point out of the range of methyl red. And the titration of ammonia with hydrochloric acid had an equivalence point that was also out of the range of phenolphthalein.. The methyl red indicator and the phenolphthalein indicator were unsuitable

Introduction This report, discusses how the concentration of a substance can be found through titration. A titration is where a substance with a known concentration is tested with a substance that has an unknown concentration to find that concentration (What Is a Titration). Titrations are very important in the food industry. It is important to know the concentration of an ingredient or chemical especially when it comes to nutrition facts and labels for a particular product. Scientists use titrations

concentration can be calculated. Most acid-base solutions are colorless and determining when one reactant has been totally consumed is difficult by simple observations. To allow us to visually determine this point, we use compounds called acid-base indicators to tell us when a reaction is complete. Dyes (usually weak organic acids) whose colors depend upon pH are often used to signal the completion of acid - base reactions. The objectives of this experiment are to: • Measure the PH of aqueous solutions