Distilled water

labeled with small vertical lines so they could be aligned with the spectrophotometer. The Spec-20 was set to 0% transmittance using the left knob without a test tube sample in the holder. Then a test tube filled three-fourths of the way full with distilled water was placed into the Spec-20’s test tube well and the pointer was set to 100% transmittance using the right hand…

capacity, mixed with 20ml. of carbon tetrachloride, 30ml of glacial acetic acid and finally 1ml. of saturated potassium iodide solution. After well shaken for 1minute, 100ml. of distilled water was added to and thus free iodine liberated in the solution was titrated by 0.01N thiosulphate solution. 1 ml. of this. thiosulphate solution corresponds to 0.00008g. of oxygen. The acid ester used here was prepared from cuttle fish oil as described…

We weighed out the appropriate amount of supplement based on these calculations and added 2mL of distilled water to each beaker and mixed to make an aqueous solution. In order to yield the correct concentration to react with the reagents, we conducted a 1:10 dilution by adding another 18mL of water to the 2mL solution already in the beaker. In clean test tubes, using three test tubes for each supplement sample (9 total) we combined 1 mL of protein…

where water molecules move from high concentrations of water to low concentrations of water through a selectively permeable membrane. Osmosis is a way for water molecules to create equilibrium between a cell and its environment. For example, if the cell is a hypotonic solution and its environment is a hypertonic solution, then water will naturally diffuse to its environment to create equilibrium. The guiding question for this experiment was, “How does alcohol concentration affect the water…

thermometer was also added to the solution, but it was simply suspended in the solution as to ensure the thermometer did not touch the bottom of the beaker. As this solution heated and the sodium aluminate dissolved, 50 mL of distilled water was placed on an extra hot beaker. Once the water began to boil, 2.6478 g (sodium silicate) was added into the beaker with constant manual stirring…

different types of chemicals? Introduction A solution is a mixture of a soluble chemical dissolved in water. Think about the difference between salt water and tap water. The salt in the salt water has dissolved and the solution looks clear, but the salt is still there and will taste salty if you taste it. Because solutions are made with water, which is made of hydrogen and oxygen, the hydrogen in the water can make a solution into an acid or a base. How do you tell if something is an acid or a…

added to water and the temperature changes…

Boil the ash with about 20cmᶟ of purified water in a beaker, and filter while hot. Collect the clear filtrate in a second beaker and allow to cool. We then placed the ash into distilled water and allowed it to boil once again over the Bunsen burner to allow the extraction of iodine to begin once this has complete all the iodine can be extracted from the water using a funnel. Ensure that the beaker is allowed a sufficient amount of time to cool before…

the pH meter. Out of ten substances that were used, five of them were found to be acidic, namely: hydrochloric acid, coke, toothpaste, milk, and acetic acid. Sodium hydroxide, buffer solution, bleach, and the detergent were found to be basic. Bottle water was found to be neutral. Substances are said to be acidic because of having pH levels lesser than 7, and those having pH greater than 7 are said to be basic. Some are neutral,…

is about extraction of benzoic acid from kerosene by water droplets that was conducted on 6 October 2015 with few group of students. The main purpose of this experiment is to determine the overall mass transfer coefficient of benzoic acid between kerosene and water. In the introduction section, it is included about the information of benzoic acid and its uses as well as the extraction of benzoic acid.…