The solution was discarded into the waste bin, and the materials were washed. The second reaction in Part B, sodium hydroxide and ammonium chloride, began by saving the data from the first reaction and setting up the LabQuest to new data collection under the same conditions as the first reaction. The cups were restacked and placed in the beaker. Using a graduated cylinder, 50mL 2M NaOH was added to the cup. The cup was then covered and the temperature probe inserted.
Defensive handwashing is key to fighting germs and bacteria. Defensive handwashing is when you wash your hands after touching something that has been or is contaminated by germs or harmful bacteria. For example, you would use defensive handwashing after you just used the restroom to get all the germs off your hands after using the bathroom, you would also use it after you just touched money, because money always has a bunch of germs and bacteria on it and the majority of people don’t wash their hands after touching money. There is a proper way to wash your hands. The proper way to wash your hands will get all the harmful bacteria and germs off of your hands.
A video I viewed of this experiment stated that after it eats the shell away, the egg could turn out to be rubbery, kind of like a bouncey ball. Due to history and past experimentation, the experiment of the naked egg illustrates the concepts of chemistry. The process to make a naked egg is very simple. Place your egg in a cup and carefully fill the cup with vinegar. Make sure that you completely cover the egg with vinegar.
The sulfates and chemicals found in exfoliators in the drugstore cause your skin to become extremely dry and prone to more breakouts. This is due to the fact that your skin is modified into thinking that it needs to produce an excessive amount of oil to compensate for the moisture lost every time the exfoliator is used. Today I will be demonstrating on how to make a homemade exfoliator. The first step is gathering
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip. Obtain a small sample of the red epidermal cells from the stalk of the rhubarb by carefully peeling away the layer with forceps. Prepare a wet mount slide of the rhubarb tissue in distilled water only.
According to the Australian Museum, Egyptians preserved organs as they, “allowed the dead person to breathe and eat in the afterlife”. The ancient egyptians your organs would continue to work, and be needed, well after death which is why it was important they were preserved. The process first involves removing all the body parts that are prone to rapidly decay, removing the the brain through the nose using “hooked instruments”, then removing the organs (stomach, liver, lungs, and intestines) and placing them in canopic jars (Egyptian Mummies). The canopic jars are filled with embalming fluid, which helps retain the organs in their original state. The only organ that isn’t removed during the process was the heart, as the ancient egyptians perceived it to be the center of one’s being and intelligence (Egyptian
Then they made a cut in the left side of the body and the organs were removed. The liver, lungs, stomach, and intestines were washed and packed in natron salt to dry out. The heart was not taken out of the body. It was not taken out of the body because the Egyptians believed that the heart was the center of thought and feeling. The brain was removed using a long hook because they thought the brain was useless.
Shake funnel and rinse off water layer ( This contains the sulfuric acid and majority of methanol). Again wash the ether with 25ml of water and then wash the organic layer with 25ml of 10% sodium bicarbonate to extract unreacted benzoic acid. Again shake separatory funnel with frequent venting of pressure and opening the stopcock. Allow the separation of layers and drain off bicarbonate layer into a beaker. Wash ether layer with saturated sodium chloride solution and retain ether layer.
The method of preparation or dealing with the dead body used by ancient Egyptians is called Mummification. Using the special method, the Egyptians removed all liquids from the body, keeping only a dry body that could not be easily rotted. It was necessary in their belief to save the body in life like the way. Today we can see the bodies of stuffed Egyptians and have a good knowledge of what he or she looks like in life, 3,000 years ago. The process used by the ancient Egyptians to make mummification was 1.
In this type of treatment, the blood is cleaned inside the body not outside the body. The lining of the abdomen (also called the peritoneum) acts as a detergent (natural filter). A cleansing solution called dialysate flows into the abdomen through a soft tube called a PD catheter. The catheter is placed during minor surgery so wastes and extra fluid pass from the blood into the cleansing solution. After some hours, the doctor drains the used solution from the abdomen and refills with a fresh cleansing solution to begin the process again.