25 ml of HCl transferred to a beaker by using volumetric pipet the beaker labeled as beaker 1. 10ml of deionized water and 3 drops of phenolphalin added to beaker 1.the same previous steps did in KHP instead of HCl and the beaker labeled as beaker 2. In 100ml volumetric flask 10 ml of unknown acid solution added. Deionized water added until the mark and mix. 25 ml of diluted unknown acid solution to 100ml beaker by using 25 volumetric pipet.
Apparatus: • Safety glasses • Bunsen burner • Heat proof mat • Sodium thiosulphate • Hydrochloric acid • 100 ml of conical flask • Stop watch • 50 ml measuring cylinder • 10 ml measuring cylinder • Distilled water • Ice • Apron • Beaker Method 1. Collect safety equipment (apron and safety glasses) 2. Collect all materials and apparatuses 3. Set up the practical for room temperature test. 4.
Then, no more than 20 drops of 15M NH4OH were added dropwise until colored complex or a precipitate was formed. An additional 10 drops of 15M NH4OH were added to the solution. To conduct the confirmation flame test, 20 drops of each metal solution were added to the corresponding labeled centrifuge tubes. After setting up the Bunsen burner and adjusting the flame, the Nichrome loop was dipped in concentrated HCl and then placed above the inner blue cone in the flame until no
A melting point will be ran on the aspirin when completely dry. A capillary tube containing the dry aspirin will be placed into the melting-point apparatus. This process is to determine the melting point range of aspirin. First, a hot water bath was created with a 400. mL beaker on a hot plate. The temperature was raised to 70 degrees Celsius and 4.419 g of salicylic acid was measured out on a balance and transferred into a 125. mL Erlenmeyer flask.
Once dissolved, 24.9734 (± 0.0045)mL of acid was pipetted into an Erlenmeyer flask along with 25mL of cool (recently boiled) distilled water. Three drops of acid-base indicator, phenolphthalein, is added to the acid solution. Acid is titrated with the unknown base from the burette as the Erlenmeyer flask is consistently being swirled. Near the endpoint of 24mL, drops of base are added to the acid solution until a light pink colour persists within the solution. Titration is repeated 3 more times in order to achieve more accurate results.
The release button on the lighter is pressed and held until approximately 90 ml of water is displaced from the cylinder; the level of the water in the cylinder should be level with the water in the trough. The temperature of the water is taken and the lighter is reweighed. All data is recorded and then this experiment is repeated three times, using all the same material. Data and Observations: As the water is displaced from the cylinder, bubbles continuously floated to the end of the cylinder as the water level went down. See Table 1 for all the recorded results.
Add “some” salt to the ice water. This cools the water down faster. (Mythbusters proved this once. ) 3. Fill the test tube about half way with distilled water and insert the thermometer.
- 1 Spectrophotometer. Method to obtain solutions: - Weigh 0.25g of Cu powder in a beaker. - Under fuming cupboard add 1 cm^3 of Nitric Acid in the same beaker. - Pour the Copper Nitrate solution into the 250 cm^3 volumetric flask and dilute it with water until it reaches the line. - Using a pipette pour 5cc, 10cc, 15cc and 20cc of the solution into different volumetric flasks each of 100 cm^3 volume and dilute them until the line mark and
Specific Heat of a Metal Michael Diaz Ms. Zhort Performed: October 3, 2013 Due: October 24, 2013 Period: 1 Lab Partner: Rocco & Asha Objective: This lab was meant to teach us how to find the specific heat of a metal sample. Materials: * Specific heat set * Balance * Thermometer * Tap Water * Hot plate * Polystyrene cup and a lid * Stirring rod * 250 mL beaker * String (about 15 cm) Procedure: 1. Fill a 250 mL beaker approximately half full of water. Place the beaker of water on a hot plate. Begin heating the water to the boiling point.
Distilled water 5. Metal bar (Unknown Metal) 6. Centigram Balance Procedures of cylinder and distilled water The initial steps of which we (including lab partner) followed in our experiment: A) Measured Mass of 10 mL cylinder 1. Weighed an empty small graduated by using the centigram balance. 2.