Day Two: 1) Gently remove the egg from the vinegar. 2) Using the graduated cylinder measure the amount of vinegar left in the beaker and record it. 3) Record any changes you observe in the egg. 4) After measuring the vinegar pour it down the sink. Rinse and dry out beaker.
Experiment: Materials: -2 graduated cylinders -4 food colorings -something to stir with -1 beaker -50 mL of water -25 mg of salt -scale to measure salt -timer Procedure: measure 10 mg of salt in the scale and put it in the bottom of the graduated cylinder before putting in anything else measure 50 mL of water and put it in a beaker add 15 mg of salt to the 50 mL of water and stir it until it is completely dissolved carefully put 10 mL of the saltwater in the graduated cylinder with the salt in the bottom put 2 drops of food coloring in the saltwater that is in the graduated cylinder wait about 1 minute until that saltwater layer is completely colored add 10 mL of water to the beaker that has saltwater in it so that the salinity of the water decreases. stir. carefully pour the water with less salt into the graduated cylinder that has the other layer(s) add 2 drops of another color to the new layer that has less salt and wait 1 minute a second layer should me forming repeat steps 7-9 so that more layers can be made Observations: the new layers take some
After 2 minutes gently removed beet cores and discarded the rinse water. 3. Placed each beet core into each of five clean dry test tubes. 4. Labeled each test tube with the solvent treatment that it was to
I then allowed the remaining liquid to evaporate leaving behind salt. I poured the salt into the weighing dish and weighed the mass and calculated and recorded into table 1. Data Table 1: Experiment Data Grams Percent of Mixture Iron Fillings 0.9 gm 19.6 % Sand 1.4 gm 30.4 %
We weighed the resulting powder to be 3.228 grams. We then transferred the powder nutmeg into a 50 ml round bottom flask and added 15 ml of dichloromethane. We placed our flask in to a standard heat reflux apparatus and gently refluxed the mixture. We waited until we saw the first drip of liquid in the apparatus and heated for 15 minutes. After the mixture was heated, there was solid on the bottom and liquid on the top of the flask.
- Spoon, Tongs, etc. Procedure: First we started out by measuring 1 cup of vinegar (Enough to cover egg) Then we placed the egg in the container that we were using for this part of the experiment. Secondly we let the egg sit for twenty four hours in the vinegar. Thirdly, we washed the egg off very gently, the transferred the egg from the vinegar to the corn syrup. Fourthly, we let the egg sit for twenty four hours.
Then, 3 drops of 3 M HCl was added to each of the solutions and the color of each was recorded. Then, the spot plate’s contents were put into the waste beaker and the plate was cleaned. After that, 1 drop of each of the five transition metal cations was added to separate holes in the spot plate, 3 drops of 3 M NH4OH was added to each hole and the color of each was recorded. Then the spot plate was cleaned again and 1 drop of each of the five transition metal cations was added to the separate holes. After that, 1 drops of dimethylglyoxime (DMG) was added to each and the color of each was recorded.
The water then became saturated. 4. The cold beaker was Beaker A. After Beaker A was tested, Beaker B was tested, which had been sitting on a heater keeping the water inside warm at 30 degrees Celsius. It was filled with KCI five times by the 5g spoon, and then five times again by the 1g spoon.
Materials 150 ml cold tap water 1-1 ounce dropper 1-small ceramic bowl 6 different materials cut into 14x5 cm rectangles 1-timer/stopwatch Procedures 1) Cut six materials into 14x5cm rectangles. 2) Fill up the bowl with 5ml of water. 3) Set one of the pieces of material into the water and start the timer. 4) When thirty seconds is up, take the cloth out immediately and throw it away. 5) Measure what is left in the bowl with the dropper and record.
BIOLOGY LAB REPORT-OBSERVING OSMOSIS Aim: The aim of the experiment is to observe osmosis by the help of the selective membrane of egg. Osmosis is the diffusion water from an area with a high water concentration to an area with a lower concentration. Research question: What is the effect of in different concentration of solutions with respect to movement of water through egg’s external membrane. Hypothesis: If I put an egg in %30 Salt Solution, because of the different concentration areas egg will get smaller as we increase concentration because water tends to move from high concentrated are to low concentrated area. (Amount of water) Variables: • Dependent Variables: Mass change of eggs • Independent Variables: Concentration amount of solute in water.