Mixture Separation October 6, 2015 Sasha Crowley Harrison Rossi Purpose The purpose of the laboratory was to determine the physical properties of four substances, then to separate a mixture of the substances based on their physical properties with limited amounts of materials available. Hypothesis At the beginning of preparing for the lab, I believed that the poppy seeds would float when put in water due to them being very small and light. Salt would dissolve when put in water because "water can dissolve salt due to the positive part of water molecules attracting the negative chloride ions and the negative part of water molecules attracts the positive sodium ions." Sand would sink to the bottom of the petri-dish filled …show more content…
In the first step of mixture separation,empty the mixture into a Petri dish filled with distilled water. Then stir them all together. Make sure the salt has dissolved. Pick up your magnet wrapped with its covering, and bring it over the top of the Petri dish. The iron filings should attract to the magnet. Next, using the plastic spoon, scoop the poppy seeds out of the dish a few at a time. The next step in separating the mixture is to set up your filter funnel. The filter funnel must have filter paper inside the cone shape or it will not work. To put the filter paper in the funnel, fold the circular paper in half, twice. Then pull three edges away from one edge and place inside the funnel. Squirt some distilled water onto the paper so it will stick. Place a beaker under the edge of the funnel to catch the water. For the final step, pour the remaining mixture components retained in the Petri dish into the filter funnel. Wait for the components to filter out into the …show more content…
I would rate our lab at about a 6-7 based on how well we did. Not all the poppy seeds floated as we had predicted all of them would have floated. The sand took longer than expected to be filtered out of the water. The steps we had to do the lab with should have been more elaborate and detailed. We should have planned ahead more than we had. If we could do the lab over again, I would chose to re-write a well detailed plan that even a person oblivious to separating mixtures could follow. I would also extend the time period we had received to do the
Our original question was what is the effect of different types of water on an Alka Seltzer tablet? What we were measuring was which type of water will make the tablet dissolve the quickest. Our hypothesis was the salt water would dissolve it the fastest, then the pond the second, and tap would take the longest. The results ended up being that the tap water would dissolve the tablet the fastest, then the pond water, and the the salt last. Our three controls are the amount of salt, the amount of water, and the size of the tablet.
Prelab week 1 Calculations Preparation of 1.5μmol/L mixed low-level standard dilution 150μmol/L × V1=1.5μmol/L × 10ml V1=(1.5μmol/L×10ml)/(150μmol/L)=0.1ml Conversion of milliliters to microliters (0.1ml×1000)μL= 100μL Preparation of 3μmol/L mixed low-level standard dilution 150μmol/L × V1=3μmol/L × 10ml V1=(3μmol/L×10ml)/(150μmol/L)=0.2ml Conversion of milliliters to microliters (0.2ml×1000)μL= 200μL Preparation of 3μmol/L mixed low-level standard dilution 150μmol/L × V1=7.5μmol/L × 10ml V1=(7.5μmol/L×10ml)/(150μmol/L)=0.5ml Conversion of milliliters to microliters (0.5ml×1000)μL= 500μL Preparation of the blank samples The volumetric flask will be filled to the mark with 150μmole/L of stock solution to act as blank (reference). Additional two blanks will
In the first part of the experiment, Part A, the standard solutions were prepared. As a whole, the experiment was conducted by four people, however, for Part A, the group was split in two to prepare the two different solutions. Calibrations curves were created for the standard solutions of both Red 40 and Blue 1. Each solution was treated with a serial 2-fold dilution to gain different concentrations of each solution.
Fill beaker with water Use the disposable pipette to place water in the graduated cylinder until the unidentified object would be completely submerged in water Record what the measurement of water in milliliters before placing the unidentified object into the graduated cylinder Gently place the unidentified object into the graduated cylinder Record the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder Subtract the measurement of water in milliliters before placing the unidentified object into the graduated cylinder from the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder, this is the volume of the unidentified object Record the volume (the answer you got in step 10) of the unidentified object in the data table Weigh the unidentified object on the scale, this is the mass of the unidentified object Record that number in the data table Calculate the density of the object by dividing the mass by the volume and rounding it to the proper significant figure, Record the density of the unidentified object in the data table Repeat the lab 2 more times and with each experiment record the data in the chart under the correct trial number corresponding with the correct
4. Pour the salt-water solution into the water bottle. 5. Stretch the open end of the balloon around the mouth of the bottle and hold it there. 6.
Next, lay the double mesh strainer on the opening of the water pitcher and hook it to the edges of the water pitcher for a better grip. Start adding the rice water through the double mesh strainer, and stir the rice with a spoon. This will allow the rice water to filter through the double mesh strainer and pour into the water pitcher. The double mesh strainer will retain all the excess rice and cinnamon. So, once done filtering enough rice water into the water pitcher, eliminate the excess rice and cinnamon.
In our gummy bear lab experiment, we experienced osmosis, the water version of diffusion. My lab partner, Maggie, and I were given two yellow gummy bears. The first one measured at 10 mm in both thickness and width, and 21 mm in height. The approximate volume was 2,100 mm^3, and the mass was 2.567 grams. The second one was 11 mm in thickness, 9 mm in width, and 20 mm in height.
Fill the well with 90ml dh20 to reach 100ml. move 10 ml of the second well to the third well. FIll the third with another 90ml dh20 to reach 100ml. Move 10 ml of the third well to the fourth well. Fill the fourth well with 90ml dh20 to reach 100ml.
In this lab we used two processes called Diffusion and Osmosis. Diffusion is the movement of molecules from areas of high concentration to areas of low concentration. Diffusion is a process that requires no energy and involves smaller non-polar molecules. In Figure 1 you can see the molecules spreading throughout the glass from the area of high concentration, so that the areas with low concentration are filled evenly as well. The other process was osmosis.
Properties of Substances Express Lab 1)The purpose of this lab was to compare the physical properties of different types of solids and how the properties of solids are determined by their intermolecular forces and their intramolecular bonds. Then we were to classify each type of solid as either ionic, metallic, non-polar molecular, polar molecular, or network. Paraffin wax classified as a non-polar molecular, Silicon dioxide was classifies as a network, Sodium chloride was classified as ionic, Sucrose was classified as polar molecular and Tin was classified as metallic. (2)The intermolecular forces that are present in Paraffin wax are dispersion forces, because it is non-polar and carries a negative charge. Followed by Sucrose that has
If impure, preform recrystallization procedure to remove the impurities. Then calculate Percent Recovered on crystals formed, and preform melting point procedure. 2. You find that a solid substance you are trying to purify is very soluble in ethanol, but not very soluble in water. You decide that you are going to try to recrystallize it from a solvent pair, consisting of ethanol and water.
Acids are proton donors in chemical reactions which increase the number of hydrogen ions in a solution while bases are proton acceptors in reactions which reduce the number of hydrogen ions in a solution. Therefore, an acidic solution has more hydrogen ions than a basic solution; and basic solution has more hydroxide ions than an acidic solution. Acid substances taste sour. They have a pH lower than 7 and turns blue litmus paper into red. Meanwhile, bases are slippery and taste bitter.
Place hydrophytes in plastic jar. Place hydrophyte in plastic jar into a container in case of spillage. Place hydrophyte in plastic jar into the heat and light insulator . Leave the hydrophyte in plastic jar in the heat and light insulator for four minutes. Repeat steps one to four with hydrophyte B and C. Place the hydrophyte into the heat and light insulator for six minutes.
Once dissolved, fill the rest of the volumetric flask up to the line on the neck of the flask. Again mix the solution. Use four, 10mL volumetric flask, and label them from 1-4. Add approximately 2mL of copper sulfate pentahydrate into flask 1, 4mL to flask 2,
Abstract — This experiment was conducted to familiarize the students with the procedures regarding distillation—to be more precise, the separation of ethanol from an alcoholic beverage—using a distillation set-up consisting of boiling chips, a Bunsen burner, a condenser, a thermometer and several other materials. In the end, it was discovered that one may actually separate a homogeneous mixture, given that the components of said mixture differ in volatility and that they utilize a complete distillation set-up and follow laboratory safety rules and regulations. Keywords — Matter, homogeneous and hetereogeneous mixtures, distillation, volatility, boiling point I. INTRODUCTION There are typically two categories of matter, these are pure substances