Materials: 1 rectangular container 1 grease pencil 4 petri dishes 4 pieces of filter paper or paper towel 40 radish seeds (10 per petri dish) 1 paper plate Tweezers 100 mL beaker Stirring Stick Salt (1g, 2g and 3g)-measured out for you Dropper Procedure: (Don’t forget to take notes in your lab notebook. Keep a detailed description of every step you take so that someone else could accurately and precisely reproduce your results). See Lab Report Format for how your final Lab Report should look. 1. Determine what your group’s hypothesis will be and write it as an “if, then” statement on your lab report.
After donning the appropriate safety gear I began by placing 3 separate sets of 10 drops of distilled water into an unused well of the 24 well plate. I added the following chemicals into one of the three sets of distilled water creating three separate chemical mixtures: HCI, Ammonia, and Sodium Hydroxide. I mixed all thoroughly with a toothpick and then sucked the mixtures into separate pipets. These were placed into the 24 well plate for later use. Using the 96 well plate I combined various chemicals together to observe the chemical changes that were created.
Students need to put the eggs, after their shells have been removed, in the corresponding jars and leave them for two days. When they return, they must observe and measure the eggs. They suppose to see that the egg in vinegar should be hypotonic, the egg in syrup should be hypertonic, and the egg in distilled water is isotonic. Both jars with vinegar and syrup are independent variables, and the jar with distilled water is the
BIO 1100 Unit 1 Homework Solution https://www.studentsoffortunes.com/downloads/bio-1100-unit-1-homework-solution/ BIO 1100 Unit 1 Homework Solution Unit I Homework Nutritional Analysis Introduction In Chapters 3 and 4 of the textbook, you learned that the body needs various macro and micronutrients in order to function properly. You also learned about cellular metabolism and what the human body uses as a fuel source. This all seems simple at first glance; however, it can be difficult to determine whether we are getting what our body needs. Even when we know what our body needs, it becomes even more difficult to make sure we are supplying our body with those needs. The car you drive probably requires gasoline in order to function
Results and Discussion For the first part of the experiment (Part A), five different 100 mL volumetric flasks were each filled with 1,2,3,4 and 5 mL of iron (II) solution. Then 5 mL of YY ligand, were poured to each of the five flasks. Each flask had 5 mL of 2M sodium acetate and 4 mL of 3M NH2OH. Then the whole solution was diluted up to the 100 mL fill mark with distilled water. This was the solution that was used in order to obtain the absorption spectrum for each of the different iron (II) ligand examples different flasks.
Look in the water bath on your table for a flask labeled DMA. This flask contains Davis Minimal Agar that has been autoclaved to make it sterile, and is being kept at 47 C to keep it liquefied. 3. Think about these important points in pouring a petri plate before doing it: a) You must work quickly, because once the container of minimal agar is removed from the bath, it will start to harden within 2-3 minutes. b) When pouring agar into the petri dish, pour just enough to fill the dish about half way.
When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette. Next, filter paper was place into the funnel and streamed with distilled water. A clean 400mL beaker is placed under the funnel and the precipitate was filtered through. When all the precipitate was filtered and removed from the beaker the residue is washed with distilled water. About 3mL of the wash water is collected in a small test tube.
Enzymes Amylase: | Tracing the Breakdown of Starch | Rashaud Pickering, Ashley Bagnis, Stephanie Alvarado, Elbany Angulo 3614098 Section U-14 | Signature___________________ Abstract An experiment was conducted to find out what the optimal temperature for amylase to break down starch was. An Iodine test was used to find evidence of starch formation. Three drops of iodine were dropped into two sets of spot plates. There were four test tubes that contained human amylase and four test tubes that contained fungal amylase. These specimens were all tested before being placed into their respective ice or water baths.
The third test will utilize thin layer chromatography to evaluate the purity of the aspirin as well as testing for the presence of leftover salicylic acid or other by products of the reactions. Experimental: Week 1: For the synthesis of the aspirin, 250 mL of water was boiled. 1.5 g. of salicylic acid were poured on a test tube. Then, 3.5 mL of acetic anhydride and four drops of 85% phosphoric acid were added. A cotton ball was placed to prevent vapor escape.
MATERIALS AND METHODS In order to prove the hypothesis we needed to get materials together and follow a step by step procedure. First we grabbed four baggies and tied one end shut; we filled three baggies half way with .25M of sucrose solution, another with .50M and the third with .75M. The fourth baggy was filled with distilled water which made it our control group, all baggies had their loose ends tied hard. Once that was done we filled four beakers with about 15cml of distilled water. We then rinsed and dried each baggy.