Evaporation Test Lab Report

Coursework Equipment List • Boiling tubes (8) I will use these because this is where I will mix both the sodium carbonate and the strontium nitrate in order to form the precipitate. I need 8 because I am going to add 8 different amounts of strontium nitrate (1-8cm³) to the 8cm³of sodium carbonate. • Measuring cylinder (1) I will use this to measure the 8cm³ of sodium carbonate and the varying amounts of strontium nitrate to put into the test tubes. • Sodium Carbonate (enough to fill 8 boiling tubes with 8cm³/64cm³)

To begin this, experiment our group start to weigh three difference empty test tube to get their mass before we put any unknown salt in so we don’t make a calculated mistake. Zeroing the balance with the beaker inside, we put the test tube in the beaker to calculate the unknown hydrate mass.

Fill beaker with water Use the disposable pipette to place water in the graduated cylinder until the unidentified object would be completely submerged in water Record what the measurement of water in milliliters before placing the unidentified object into the graduated cylinder Gently place the unidentified object into the graduated cylinder Record the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder Subtract the measurement of water in milliliters before placing the unidentified object into the graduated cylinder from the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder, this is the volume of the unidentified object Record the volume (the answer you got in step 10) of the unidentified object in the data table Weigh the unidentified object on the scale, this is the mass of the unidentified object Record that number in the data table Calculate the density of the object by dividing the mass by the volume and rounding it to the proper significant figure, Record the density of the unidentified object in the data table Repeat the lab 2 more times and with each experiment record the data in the chart under the correct trial number corresponding with the correct

Students first prepped for the lab by cleaning out the crucible. Three boiling chips were added in the crucible once it was wiped out with a paper towel. The crucible was then placed on a clay triangle two finger widths above the Fischer burner. After 10 minutes of the crucible being directly under the flame, the it was clean and students allowed time for it to cool down. Next, the students from then on used tongs to transport the crucible from weighing it and back to the clay triangle.

In this experiment, we devided each of the different beans. We used mug, black, and coffee beans. By placeing a plate for each bean, We where able dividing each the mug, black, and coffee beans into each plate. After dividing each bean we labled the name and group so we can better understand the difrence between the beans. The meathod of division is very simple and organized, alows to diffrentiate the difrence between each bean.

Weigh egg and record new weight. Place egg back into beaker and cover with distilled water. Let egg sit for 1 hour then record observations. Dispose of egg Data: FIGURE 1 Mass in grams Observations Percent change Original egg 53 White in color, smooth texture, no smell 0% Egg after soaking in

5) Measure the volume of each modeling clay with a graduated cylinder. 6) Record all the results to the tenths place or rounded to the nearest tenths place. 7) Repeat 2 more time from number 4 to 6, using two new batches of green modeling clay (to reduce

Experiment: EXP5-Percent of Water in Hydrated Salt Manika Srivastava Lab Partner: Natasha Seebaran Chem 1300/DA3 Date: 1/30/18 Professor Richard H. Perry Abstract: The purpose of this experiment was to determine the percent by mass of water in a hydrated salt as well as learn to handle a laboratory apparatus without touching it. The mass of water lost in grams for trials 1 and 2 are 1.7220g and 1. 2993g.

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 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.

Fill the well with 90ml dh20 to reach 100ml. move 10 ml of the second well to the third well. FIll the third with another 90ml dh20 to reach 100ml. Move 10 ml of the third well to the fourth well. Fill the fourth well with 90ml dh20 to reach 100ml.

Next, there is mass this contains 5 sections in it these are: • challenge

Each group was assigned a different percent of sucrose solution out of the four variables; 0% , 5%, 10%, and 15%. After we filled the beaker we then got two potato cores. Once we had the cores we cut the skin off the ends. Following this we then cut the two potato cores into four 2.00 cm potato cores. After they were cut into 2.00 cm each we found the mass.

Place cloth at the bottom, near the mouth of the bottle, then fill it will pebbles, and sand, cloth, charcoal, cloth, sand and pebbles. The sand and pebbles will filter

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