and I would see if the cylinders increased or decreased in mass. I used salt solution in three different concentrates: 0.0M, 0.5M and 1.0M. I put 20cm3 of each concentrate into 3 different boiling tubes, which were then placed in test tube racks. I then placed a cylinder of potato in each boiling tube and left them for three days. My results were inconclusive because I left them in the solutions for too long so the potato cylinders started growing mould. I tried to measure them to see if
Biology Experiment Hypothesis I predict that the potatoes in the solution with high sugar concentration will increase in mass the most, the potatoes in the water with no sugar will lose the most mass. Osmosis is the movement of water from a high concentration to a low concentration across a particularly permeable membrane. The water can move between the potato and the solution but the sugar can’t because the molecules are too big to pass through the membrane. The water will move
according to the ratio of the I made sucrose concentrations of 6 various concentrations ranging from distilled water to 1 Molar sucrose concentration (and poured the specific amount when mixing a certain solution and pour them into separate boiling tubes) using a specific sucrose: distilled water ratio and labeled them with their sucrose concentration separately.
for the preliminary: * 1 large potato (skin intact) * 3 boiling tubes * Set of cork borers * Scalpel * Balance (accurate to 2 decimal places) * Distilled water * 0.5M sucrose solution * 1.0M sucrose solution * Dropping pipette * Boiling tube rack * Measuring cylinder (accurate to 1cm3) * White tile Take a large uncooked potato, with the skin still on, and with the cork borer, cut out three "tubes" of potato. Do this onto a white tile, so you don't cut your
clock Boiling tubes (100ml, 10ml) Salt solutions of various strengths A balance Test tubes Test tube holders A scalpel A teat pipette DIAGRAM PLAN I will get 5 test tubes and place them into the test tube rack. I will then cut up 5 pieces of potato and weigh them to make sure they all weigh the same weight to make the test fair. To make the 1% solution you have 50ml of 2% salt solution already made by the teacher and 50ml of water, shake the boiling tube up and pour
Insulating Materials Introduction In this investigation I aim to find out which materials are the best insulators. This practical investigation involves investigating what kinds of materials are best at keeping water in a copper beaker warm. A material that prevents this heat loss is called an insulator. Insulators have to prevent three types of heat loss: · Conduction · Convection · Radiation Conduction - This is where heat energy passes through the walls of the copper beaker by
Heated at 80°C for 5 minutes Fair Testing ------------ * The temperature of a substance affects the rate at which it reacts with another. This is because the molecules have more kinetic energy making them react faster. Therefore each test-tube of orange juice must be cooled to the same temperature (probably room temperature) before they are tested for their ascorbic acid content, otherwise the results will be inaccurate. * Using the same carton of orange juice should ensure that the
Typhoid fever is a serious and sometimes life-threatening infection that mostly affects people in third world countries, where clean water and other sanitation measures are hard to come by. People usually get typhoid fever by drinking water that contain infected feces. People that carry the illness also can pass the disease onto others directly. For example, having physical contact with another person one may pass the disease onto that person. Bathing in the water that contains the S. Typhi bacteria
harm to the Earth. As a result of pollution, there are third world countries that don’t have the money to support themselves with a water sanitation system should start using money efficient ways to clean their water as best as they can; such as boiling water and chemical treatment for water. But currently the capability to use water to survive and live doesn’t apply to 20 percent of the 6.6 billion people on this planet. In addition there is another 40 percent of these people who aren’t able to
Someone walks into a fancy seafood restaurant, he/she would usually get some sort of lobster-oriented dish. Lobster is just food to many people and those people do not think much about the fact that those lobsters that they are eating were once living creatures. “Consider the Lobster” by David Foster Wallace talks about lobsters during the Maine Lobster Festival. PETA is also brought into the piece as they dispute the cooks who think lobsters do not feel anything while being boiled alive. Lobsters
My family’s preferred dinner meals is smothered pork chops. From the aroma of the kitchen to the juicy, pork chops coming off of the stove. Oftentimes, my husband and I make dinner together to enjoy some quality time and conversation while making an enjoyable meal, but not with smoother pork chops. He loves to say he gets full off the scent, so he sits in another room, so he can eat as much as he wants once the food is complete. Smothered pork chops are a meal that I know once my family eats it
essay “Consider the lobster”, Wallace states, “Lobsters do have nociceptors, as well as invertebrate versions of prostaglandins and major neurotransmitter via which our own brains register pain.” (Wallace par. 13) Humans just throw the lobster in the boiling water without a second thought of the intense pain the animal is about to go through in order to provide for a meal.
1-Bromobutane 1-Iodobutane Silver Nitrate 250cm3 Beaker Pipette Ethanol (2cm3 per tube) Bunsen Burner Tripod Test Tubes Stop Watch Water Bath Control and Variables · Use a pipette and measuring cylinder to measure exactly 2cm3 of ethanol into each of the three test tubes. (Make sure when using the measuring cylinder that all the readings are taken below the meniscus) · Heat the tubes together to ensure the same temperature · If I allow the temperature to get too high
· Heat proof mat. · Boiling tube. · Delivery tube. · Water bath. · Water flask. · Thermometer. · Stop watch. · Yeast and Sugar. · Digital weighing scale. · Water. · Measuring cylinder. · Test tube. · Tripod Method: · Fill the water bath with water (not to the maximum). · Fill the boiling tube with 10ml of water. · Add 2g of yeast to the water and add sugar (1g, 2g, …up to 5g). · Put the Boiling tube into the water bath. ·
of Elodea Plan: Method: 1) First I will put some water into a boiling tube and add 5 spatulas of Sodium Hydrogen Carbonate. I will add 5 spatulas of Sodium Hydrogen Carbonate as it reacts with water and forms carbon dioxide; also I have so much so that I have carbon dioxide in excess. 2) Then I will cut off 5cm of elodea and place it into the boiling tube. 3) Thirdly I will place the boiling tube in a test tube holder 5cm in front of the light source. 4) Then I will count the
standard test tube, one boiling test tube, and one centrifuge test tube will be filled with water at 40°C. A thermometer will be placed in each tube to measure the decrease in temperature of the water. This will be timed for 300 seconds using a stopwatch. The temperature of the water will be recorded every 30 seconds. Preliminary Work A prior experiment similar to the one outlined above, was carried out to determine the sizes of the test tubes. The surface area and volume for each tube used were
these alcohols are apart of the Hydrocarbon chain. Apparatus; I will need the following to carry out my investigation for the Experiment; Top pan balance - To measure the weight of the fuel. Clamp Stand - To hold the boiling tube above the crucible. Boiling tube - To hold 30 cubic centimetres of water in. Heat proof mat - So the Bunsen burner doesn't burn the table. Bunsen burner - I need the flame to light the taper. Measuring cylinder - To measure 30cc of water in. Mineral
Requirements: l Large test tube (24 * 150 mm); l Stopper to fit test tube; l Pin; l A small glass tube to transfer pigment solution; l Chromatography paper or filter paper; l Rack of test tube; l Pigment solution; l Solvent (5 cm3). Procedure: l A strip of absorptive paper has been prepared. It has such a length that it almost reaches the bottom of a large test tube and such a width that the edges do not the sides of the tube; l Draw a pencil line across the
tuber · 1 cork borer · 1 ceramic tile · 1 scalpel · Paper towels · 6 boiling tubes · 1 marker pen · 0.1M, 0.3M, and 0.5M sucrose solution · Access to an electric balance · 1 funnel Method ====== The volume of each boiling tube was calculated, and then 2 tubes were half-filled with 0.1M sucrose solution, 2 tubes were filled with 0.3M sucrose solution, while the final 2 tubes were filled with 0.5M sucrose solution. Then 6 cylinders of potato were cut from the
· 5 Boiling tubes · weighing scales · sucrose solution · cork borer · a knife · white slate · potato Method: for my experiment I will: 1. place 3cm depth of distilled water into a boiling tube and label A 2. place 3cm depth of weak sucrose solution (0.25 Molar) into a boiling tube and label B 3. place 3cm depth of medium sucrose solution (0.5 Molar) into a boiling tube and label C 4. place 3cm depth of stronger sucrose solution (0.75 molar) into a boiling tube