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 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
First, you place the bunsen burner on the ring stand and tightly place the metal ring and place the clay triangle on it. Before placing the crucible on the ring you must put baking soda in the crucible, and place it on the ring stand. Then with safety precautions light the bunsen burner with the matches provided. In our first experiment we first started with 1.04 grams of NaHCO3 and ended with .60 g Na2CO3. In the second experiment we started with 3.2 g NaHCO3 and had a result of 2.0 grams
• Examine the differences in percentage concentration for each fruit piece. • Wipe the extract water and then measure your pieces. • You will be examining the percentage by weighting the fruit pieces before and after you insert them in the beaker and they have been in there for a day. Table 1: Initial weight of each piece of fruit.
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.
(1) If the crucibles were not put in the oven at the end of the experiment, there could be excess moisture trapped in the crucible. This contributes to the mass of the weighed crucible at the end of the experiment, meaning the mass would be higher than it would normally be. After calculations, it can be concluded that the moisture in the crucible shifts the data up, creating an artificially high concentration of Al3+. (2) Reading the volumetric pipet to 25.00mL is an incredibly crucial step in this experiment because it’s the only source of Al3+ that is added to the reaction. This step affects the end result when weighing the precipitate because in the reaction, the Al3+ is the limiting reagent and is in a 1:1 stoichiometric ratio with the precipitate product.
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
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.
The items that were massed were the evaporating dish, watch glass, and NaCO3. The materials were massed once before and once after being heated in the drying oven. The mass of the evaporating Dish before was 46.57 g; while after being heating was 60.15 g. The mass of the watch glass before was 57.97 g and after was 48.75g. There were two masses taken for the substance NaHCO3- one with the evaporating dish and one without, subtracted out after the lab was concluded. The mass of the substance with the dish was 48.79 g before and 62.33 g after; meanwhile, the mass of the substance without the dish was 2.22 g before and 2.18 g after. The mass of the NaHCO3 had changed after the reaction occurred along with after it was placed on the hot plate and being in the drying oven.
Remember to also record this. So you know with what the initial mass was. 11. The next step take out the beakers with the sucrose solutions. Remember that the 0.0 beakers will have distilled water.
The object was dried with a paper towel to avoid any water droplets and the mass balance was checked to read 0.0 g when nothing was on it. The first measurement that was retrieved as the mass of the metal object was 24.15 g. This was repeated for a second measurement of 23.85 g, and a final measurement of 23.82 g. All three mass measurements were recorded. Moving forward, to find the volume of the metal object, the graduated cylinder
Test tube (Of 100 ml) 3. Water Jar (Of 700 ml) 4. Measurement Scale ( Up to 20 ft.)
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
