The Crucible: Three Boiling Chips

The lid was placed on top of the crucible. The crucible was placed above the burner then The burner was ignited, and the flame was adjusted to obtain a blue cone. The crucible was heated using the burner for 7 minutes. The flame was turned off, and the crucible was allowed to cool down to room temperature. The crucible was weighed

In the lab “All That Glitters” the objective that was focused on during the lab was calculating the density, volume and mass of various substances. The method that was used in finding the volume of the samples is called the displacement method. This is a process where the volume of the water in the graduated cylinder is calculated before and after the sample is placed. In this lab, the goal of the experiment was to identify and come to consensus about what the unknown substance might be. For this experiment, the required materials were ten pre and post pennies, unknown sample, graduated cylinder, weigh boat, water, paper towels and a weighing scale.

The method of messuring, after deviding the rest of beans in the plates, we measured the weight of each plate of the mug, black, and coffee beans. we had a total of two plates each for the beans mug, black, and coffee beans. for the mug bean plate one the total

The lab is finished, but it has not being grading by Dr.Scandale, the score of Lab 4.2 is zero. It weights 15

The liquids were used to see how the powders reacted. The burner was used to see what happen to the

The potatoes were removed from the beakers after the 20 minute period. Each potato was weighed once more on the electronic balance scale to obtain the final mass. The data was recorded for each potato and the amount of sucrose they were placed in. The experiment was only done once. Results

I. Purpose: To experimentally determine the mass and the mole content of a measured sample. II. Materials: The materials used in this experiment a 50-mL beaker, 12 samples, a balance and paper towels. III.

The dictionary defines a crucible as a place or occasion of severe tests or trials. During the late seventeenth century, many places around the world began to have an increased fear of the supernatural. Witch trials sparked by these fears brought great pressure upon all involved. In Arthur Miller’s The Crucible, the people of Salem were placed under a lot of pressure as the witch trials were occurring. With pressure mounting, three men from the story each struggled in a different manner; Parris becoming fearful and cowardly, Hale undergoing a change in character, and Proctor taking a stand for what he believed to be right.

Test tube (Of 100 ml) 3. Water Jar (Of 700 ml) 4. Measurement Scale ( Up to 20 ft.)

We zeroed out the scale and weighed all four potato cores at once and recorded the mass. We then put those potato cores into the beaker of 75 mL of solution. With the potato cores in the beaker we then put a watch glass over the top of the beaker to minimize the amount of solution that evaporates. We let the potato cores sit in the solution overnight. The next day we then emptied the beaker of the solution by carefully draining the solution, while not letting the potato cores fall out.

For the block A: Here the net downward (along the incline) force acting on the block Fa = m*g*sinθ + m*aT (component of weight and psedo force) So Fa = 1*10*sin30 + 1*5 = 10 N Also the normal reaction on the block will be Ra = m*g*cosθ = 1*10*cos30 = 8.66 N

7) Test tube four contains 7 mL of distilled water and 3 mL of CoCl2. The fifth had 7 mL of distilled water and 3 mL of CoCl2. 8) Test tube five contains 6 mL of distilled water and 4 mL of CoCl2. 9) Test tube six contains 5 mL of distilled water and 5 mL of CoCl2. 10) After all of the test tubes are prepared, they will be put into cuvettes.

Weight a clean, dry, porcelain evaporating dish on the electric balance and record this mass on an appropriate data table. If the crucible needs to be washed before use, then heat the crucible in the Bunsen burner flame for a few minutes and remove any residual water. Then allow it to cool before continuing. Fill the crucible about 1 gram with the hydrated salt and reweight. Assemble the ring stand, ring, clay triangle, and Bunsen burner

Record the readings for the time taken, for the particular height (the paper cup was dropped from). Repeat this process (using the same equipment), by varying the height of paper cup from the ground (with a specific difference in height, in each experiment). The independent variable, which is the height the empty muffin paper cup is dropped from, will start at 1 metre and the increase in height will be 0.5 m in each experiment. The use of the clamp stand is effective in this experiment because it will always control or keep constant, the height in which the paper cup is dropped from, unlike somebody dropping the paper cup using his/her hands.

This experiment has to be carried out carefully