Then after agitating the seaweed to remove monosodium glutamate and pouring off the water, 40 mL of distilled water was added to the seaweed and heated. During this procedure, the iodine extract was filtered and several tests, both standard procedure and home- Objective: The purpose of this experiment is to understand how a single substance can be isolated from a mixture, like seaweed and water. Also, learn how to utilize filtration and extraction to make a tincture for testing for Iodine, Iodide Ion, and Triiodide Ion. Procedure: 1. 6 grams of dried seaweed, cut into ½ inches should be places into a 150 mL beakers that will later be filled with ¾ distilled or deionized water.
Topic 5: On the wild side 17. Describe how to investigate the effects of temperature on the development of organisms (eg seedling growth rate, brine shrimp hatch rates). Procedure You will need: • Brine shrimp egg cysts • 2g sea salt for each treatment • 100cm³ de-chlorinated water for each treatment • 40cm³ beakers (one for each temperature to be tested) • Water baths or incubators (one for each temperature to be investigated) • Stirring rod • Magnifying glass • Pair of forceps • Fine glass pipette • Bright light Experiment: 1. Decide on a range of temperatures from 5°C to 35°C to be tested. 2.
of mixture Metal C 25.605g 24.6mL 25.2°C 100.5°C 28.7°C Calculations: Show your work and write a short explanation with each calculation. Part I: 1. Calculate the energy change (q) of the surroundings (water). We can assume that the specific heat capacity of water is 4.18 J/ (g · °C), and the density of water is 1.00 g/mL. (4 points) q = m × c × Δt Given: q=?
Exercise 2: a. 0.43 g of ZnI2 B 5E-4 moles of ZnI2 c. 0.161M* x L=moles of ZnI2 in solution 84 mL for the first student 31 mL for the second student 3. Exercise 3: a. 2.56 g/500 mL (given) b. 0.00512 * 500 = 2.56 c. 0.00806 * 319.9= 2.56 d. 0.00806 * 319.9 = 2.56 500 mL =0.5 L e. 0.0161 * 500 / 2 =2.56 4.
The seaweed will be cut and weighed (6 grams) and transferred into 150 mL solution. Using 40 mL of distilled water the seaweed is heated just under boiling for five minutes. After cooling, a filter will be used to remove the seaweed from the extract. The goal is to transfer 2-3 mL of filtrate into the evaporating dish. We now slowly pour the solution into a funnel with filter paper.
(Eksp Klin Farmakol) According to The Scientific Method II (C.Gervasi-2010), as a crustacean, the daphnia is closely related to freshwater and brine shrimp, and more distantly related to a crab and lobster. The common name “water flea” comes from the jerky movement which they move through the water and their overall body shape. The daphnia’s bodies are almost transparent and with a microscope, the heart beating
Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory swimming style resembles the movements of fleas. Daphnia live in various aquatic environments ranging from acidic swamps to fresh water lakes, ponds, streams and rivers. The heart is at the top of the back, just behind the head, and the average heart rate is approximately 180 bpm under normal conditions. Daphnia, like many animals, are prone to alcohol intoxication, and make excellent subjects for studying the effects of the depressant on the nervous system due to the translucent
Breath Is Life. A Goldfish Respiration Experiment 03/05/15 Tom Nash Fish are able to breathe by swimming along and letting water pass through their mouth, over their gills, absorbing the dissolved oxygen that is in the water and out the operculum, or gill flaps. Fish are ectothermic, which means they are cold blooded and the environment it is in determines their body temperature. Therefore it is hypothesized that the more warmer the water, the respiration of a fish will go up. This experiment is to show the respiration of a fish in different water temperatures.
Also we have been testing the effects of diffusion through a membrane. 2. Why did the egg shell disappear? The egg shell is made up of 94% calcium carbonate, 4% organic matter, 1% magnesium carbonate and 1% calcium phosphate. On the other hand cider vinegar which I used for this experiment is made up of 5% acid and 95% water.
As carbon dioxide is released into the water through the respiration of the crayfish it is converted into carbonic acid shown below. CO2 + H20 H2CO3 As more carbon dioxide was released into the water surrounding the crayfish the water became more acidic. We could then measure the amount of CO2, by measuring the amount of a basic solution, in this case sodium hydroxide (NaOH) to neutralize the acid. We used the pH indicator phenolphthalein, which is colorless in acidic solutions and turns red in basic solutions. The more carbon dioxide in the water the more sodium hydroxide was needed to neutralize the solution.