5.03 Calorimetry Lab

One sowbug was then placed in the 3cm gap of the container and 30 seconds was started on the stopwatch. When time was completed we observed which side, grass or sand, the sowbug had preferred. Then, the sowbug was removed and a new one was placed in the container. The same steps were taken for each of the 20 bugs.

The percent mass of each component of the mixture was 23% iron, 61% sand, and 8.7% salt.

If there is an additional unmeasured amount of water in the Erlenmeyer flask, then this would reduce the concentration of the HCl, and therefore reduce the molarity. The volume of the amount of HCl solution added would increase, yet the concentration of the HCl would remain the same, which would ultimately result in the molarity of the HCl being lower than in reality.

Purpose: To find the relationship between the mass and the volume of the four samples.

Practice making bubbles until you feel comfortable enough to begin collecting the most valuable data.

Create a water bath by filling ½ of the 100 mL beaker with cool water, adding crushed ice to the beaker so the water level is just below the top, and sprinkling salt into the beaker and mixing

A random amount of soil, 40.00 grams, was chosen to be consistent throughout each section of the entire experiment. To gauge how much water would be needed to saturate the soil to 100%, two-times as much water was added to the soil, or 80 ml, and the mixture was stirred together. After waiting 1 minute, excess water was poured off, repeating the cycle until no more water was found to be pooling on the soil. The mixture was weighed and the original mass of the soil was subtracted from the current mass, producing the mass of the water at 100% saturation, or 61.25 ml. Sixty-one and one quarter mL was then multiplied by 0.25, 0.50, and 0.75 respectively to produce the amounts of water that would represent the soil at 25%, 50%, and 75% water saturation. These percentages were chosen because the extreme percentages, 0% and 100% saturation would have been avoided by the isopods

a. Use a graduated cylinder to add 200 mL deionized H2O to a clean 600 mL beaker

The purpose of this experiment was to determine the specific heats of three different metals by reading the temperatures of the water with a water-boiled metal immersed in it. Methods employed included weighing items on electronic balances, boiling water using a bunsen burner, recording temperatures, and doing calculations. EXPERIMENTAL PROCEDURE For this laboratory experiment, we used water, three cubes of different metals, a bunsen burner, a ring stand, a thermometer, electronic balances, beakers, and a styrofoam cup.

Procedure Step 1: Obtain a gas syringe and set the volume to 20mL Step2: Obtain a thermometer and record the temperature of the gas syringe. Trial A: Record the volume and temperature of the gas. Trial B: Obtain a 250mL beaker, add 200mL of ice water,

There will be a control group which will get soil from the wetland and well water. There will be three more groups. One getting inoculated soil and well water. A second getting inoculated soil and well water with 672 mg/L Ca(NO3)2 and 372 mg/L K2HPO4 as used by Picard (7). These additives are common fertilizers in an agricultural setting and dissolve easily in water. The third will get wetland soil and well water with 672 mg/L Ca(NO3)2 and 372 mg/L K2HPO4. Each group will be replicated 10 times to get comparative results.

The main objective for experiment one was to find out the effects of groundwater contamination. Since different contaminates were added to the water it was different outcomes. “Expansion of residential development into watershed recharge areas increases the likelihood of contamination in not only surface water but also groundwater resources by waste water effluent. This effluent contains a variety of organic waste water compounds (OWCs), including excreted hormones and pharmaceuticals, detergent components, and disposed household and personal care products that

where p is the density, g is the acceleration due to gravity, h is the height of the solution and r is the radius of the capillary.

Pour 30 mL of water in the petri dish labeled ”water” and 30 mL of the diluted sulfuric acid into the petri dish labeled “Acid Rain”.

For the second week, the experiment performed was done using Acid and base in place of water. 50ml of water was