Cold Water Lab

The experiment that was done was to figure out “Does the amount of calcium chloride affect the temperature of water?” For the procedure, the experiment asked to record the initial temperature of 75 mL of water. The first trial said to add zero scoops of calcium chloride and stir for two minutes to record the temperature. Once the first temperature was recorded, it must be written from the difference between the initial temperature and the new temperature. Next, it asked to add one scoop of calcium chloride and stir for two minutes and record.

Then the scientist will observe the different rates of reaction with temperature. The Boltzmann distribution of law, indicates that high temperature makes molecules gain high energy contents (pubs.acs.org/doi/abs/10.1021/ja). In order to measure the reaction rate, the scientists must use the same volume of water at three different starting temperatures: hot tap

Experiment 13.1 Purpose: To determine the ∆H of a chemical reaction. Materials: 2 Styrofoam cups, Thermometer, Vinegar, Mass Scale, Measuring tablespoon and ½ teaspoon, Lye, and Safety goggles.

During the cooler seasons, Virginia gets very cold and thus, the people living in Virginia also get cold. The colder temperatures, not only in Virginia, are the reason for the existence of hand warmers. The experiment conducted was perused for the sole reason of saving money on these said hand warmers. If having more sodium acetate in the hand warmer lasts longer with the highest temperatures than having less sodium acetate, then one would simply buys the bigger hand warmer. After making sodium acetate, the liquid was placed into pouches, which would go on to be tested for their temperatures over a certain period of time.

Synopsis This laboratory report gives an outline of the experiment which was carried out in order to measure the density of water at different temperatures via two different methods. The lab consisted of two parts. In the first part the density of water was measured by hydrometer. At first the density of water at room temperature was measured.

During my experiment I hope to find that out what drink will melt the ice the fastest. This can also make me question what is in that liquid that can melt ice quicker than water. When water is a different temperatures, the ice may melt more faster in the medium with the higher temperature.

Introduction: In this lab, of water in a hydrate, or a substance whose crystalline structure is bound to water molecules by weak bonds, is determined by heating up a small sample of it. By heating, the water of hydration, or bound water, is removed, leaving only what is called an anhydrous compound. Based on the percent water in the hydrate, it can be classified as one of three types: BaCl2O ⋅ 2H20, with a percent water of about 14.57%, CuSO4 ⋅ 5H2O, which has about 36.0%, and CuCl2 ⋅5H20 (21.17%).

The science behind this is very simple, it involves the behavior of gases. Atoms in a gas is free flowing. They respond and move faster when there is heat, and slower when it is cooler because of a loss of energy. It then changes the pressure of the gas, as the atoms in a certain volume of gas changes. In this experiment, we heated to can with water in it until it was boiling, which

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.

The Gummy Bear experiment illustrates osmosis, a type of diffusion involving the movement of water molecules through a semi-permeable membrane. The gummy bear represents the semi-permeable membrane. The area inside of the gummy bear had a higher solute concentration than the area outside of the gummy bear, so the water was moving. In situations like this, water tries to move from an area of high water concentration (or low solute concentration) to an area of low water concentration (or high solute concentration). The water moves around until it achieves an equilibrium.

Another five tea bags were soaked for fifteen seconds in beaker B and then removed. The same teabags were then placed into beaker C for two minutes. They were removed after the time elapsed. 4. The solutions were allowed to cool to room temperature using an ice bath.

Then, They poured a glass of ice water from the refrigerator, and put the ice water into the microwave and heating for two minutes. I was surprised to see them doing these several things, and I asked them “why not use a kettle?”,and they answer me they never drink hot water. They are used to drinking ice drinks, even if they

a. Water boils to produce steam at 100 C (212 F) b. Water produces gas with sodium metal c. Water and oil separate when combined d. Water dissolves sugar 22. In the experiment, students put brine shrimp in water with different concentration of salt and counted the number. Which of the following changes to the experiment will increase confidence in the validity of the result? a. Count the number of dead brine shrimp instead of living brine shrimp b. Add more brine shrimp to the water with the highest salt concentration c.

Repeat steps 13-16 for two more trials to achieve precise data. Take your beaker of water (150 mL) or ice out of the freezer. Measure 50 mL of water and see if it is 10 degrees celsius (if the water’s temperature is more than 10 degrees celsius, leave it in the freezer longer. If the water is colder than 10 degrees celsius, leave it out to warm up).

As the water boils inside of the flask, steam is produced. When the stopper and straw are inserted, all of the air is forced