Nest one Styrofoam cup in another 11. Obtain an exact mass of tap water (45-50g) to serve as cold water 12. Put a magnetic stirrer in the bottom of the calorimeter 13. Secure temperature probe to a ring stand 14. Place temperature probe through hole in cardboard lid and position probe about 1cm above bottom of calorimeter 15.
Gravimetric Determination of Sulfate Purpose The purpose of this lab is to determine the percentage of sulfate in the hydrate by precipitating the sulfate as barium sulfate. Materials Filler paper Sodium sulfate Graduated cylinder Bunsen burner Watch glass Beakers (250 mL, 400 mL) Rubber bulb Graduated pipette Beaker tongs Funnel Filter Paper Sodium Sulfate Drying oven Wash bottle Stirring rod Silver nitrate Hydrochloric acid Distilled water Small test tube Procedures First, .4861 grams of sodium sulfate was placed into a clean 400mL beaker. Exactly 200mL of water and 1mL of HCl was added to the same beaker. A watch glass was placed on the beaker and the solution was heated using the Bunsen burner to a gentle boil. The watch glass was removed with the beaker tongs.
First, heat the crucible without its lid, with a strong flame. 6. When the magnesium ribbon starts to burn, cover the crucible with its lid. 7. Using a pair of tongs, carefully raise the lid a little, at intervals.
(50cm3 exactly), and pour the water into the copper calorimeter beaker. 6. Put the thermometer into the water (it should not touch the copper beaker) and record the temperature of the water at the start. 7. Hold the needle (with the nut), with a pair of tongs and set the nut on fire using the spirit lamp.
Materials/Equipment: 50 ml beaker, hot plate, plastic funnel, aspirator, rubber tubing, ring stand, clamp, iron ring, weighing boats, magnetic stir bar, disposable pipet(s), filter flask, Buchner funnel, filter paper, distilled water bottle, stirring rod, watch glass, litmus paper- red, 10 ml graduated cylinder. Copper turnings, 6 M HNO3, 6 M NaOH, 3 M H2SO4, Zinc, 6 M HCl Methods: To begin the experiment, the set up was assembled using ring stand, hot plate, rubber tubing, aspirator, funnel, and beaker. A fume hood was created for the reaction. For step 1, copper was obtained. The mass was recorded and transferred to a 50 ml beaker.
Materials: 6 V battery, digital multimeter, two physics texts, ring stand, beaker, two bar magnets, magnetic compass, fine insulted wire, length of 12-gauge copper wire, and connecting wires with alligator clips, knife switch. Experimental Design & Procedure Data: Figure 1 Figure 2 Figure 3 Figure 4 Part A 1. Push the piece of bare copper wire through a sheet of paper and attach the ends of the bare copper wire to alligator leads. Support the paper and bare copper wire with two physics texts. Place the lower alligator clip and connecting wire on the lab table and hang the upper connecting wire from the ring stand.
The calorimeter was designed in 1780 by a chemist named Antoine Lavoisier with help from a mathematician by the name of Pierre Simon de Laplace. Now a widespread tool, we will be using the calorimeter, and our knowledge of equations to find the specific heat of zinc and aluminum. OBJECTIVE/GOAL In this experiment we will Measure the mass and temperature of water in a calorimeter Heat a metal sample of a known mass to a specific temperature Calculate the change in water temperature caused by adding the hot metal sample Calculate the specific heat of the metal using your mass and temperature data PROCEDURE 1. Prepare a data table as directed in the Analysis. Safety goggles and lab apron must be worn for the experiment.
LAB 1 NAME: Amy Rampersad. DATE: Saturday 7th April, 2012. TITLE: PREPARATION OF A SOLUBLE SALT BY A TITRATION METHOD. AIM: To prepare Sodium Chloride crystals by Titration of Sodium Hydroxide with Hydrochloric Acid. APPARATUS: Burette (50 cmᶾ), Pipette (25 cmᶾ), two conical flasks (250 cmᶾ), two beakers (250 cmᶾ), funnel, wash bottle, retort stand, boss and clamp, evaporating dish, pipette filler, hot-plate.
Separate the sand by boiling water and pouring the water off, then move on to separating the Benzoic acid using filter paper. Lastly separate the salt out by allowing the water to evaporate from the solution. Data Tables: Data Table 1: Experiment Data | | Grams | Percent of mixture | Iron filings | 1.5g | 24.6% | Sand | 1.6g | 26.2% | Table salt | 1.8g | 29.5% | Benzoic acid | 1.2g | 19.7% | Total | 6.1g | 100% | Questions: A. I proposed the magnet would remove the iron from the mixture. I thought the sand might be removed by filtration. I thought distillation would remove the salt.
PROCEDURE 1. Get the following equipment for your group: burette pipette syringe with piece of rubber tubing attached 1–250 mL beaker 3–100 mL beakers grease pencil stand and burette clamp Each beaker must be clean and dry. Label one 100 mL beaker “ACID”, one “BASE” and one “RINSE”. 2. Pour about 80 mL of NaOH solution into the BASE beaker.