Exp15proposal

Exp15proposal - Determination of the Purity of the Baking...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Determination of the Purity of the Baking Soda Produced by the Athenium Baking Soda Company Lab Partners: Angela Goncalves Jeffery Wang Anqi Zhou Date: October 30 th , 2007
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Procedure List of Chemicals Sodium carbonate Na 2 CO 3 Baking soda sample 1.0 M hydrochloric acid solution HCl 0.1 M Calcium chloride solution CaCl 2 0.1 M Potassium chloride solution KCl 0.1 M Lithium chloride solution LiCl List of Equipments MeasureNet spectrophotometer, cuvettes and nichrome wires o Spectrophotometer is a device that can be used for measuring the wavelength and intensity of visible light emitted from flames containing GroupIA and IIA metal atoms. MeasureNet pH probe and drop counter Volumetric flasks Beral pipets Kimwipes Crucible and lid Experimental Procedures: Part A: Determination of the percent by mass of NaHCO 3 by Titration 1. Obtain approximately 1.00g of baking soda sample, measure and record the mass of the sample on the Data Sheet. 2. Get an 80mL or 100mL beaker. Fill the beaker with 25-30mL of distilled water and add the baking soda sample to the beaker to create a baking soda solution. 3. Obtain a magnetic stir bar, a magnetic stirrer, a 50mL buret, and a ring stand.
Background image of page 2
4. Assemble the pH electrode and MeasureNet drop counter on the ring stand. 5. Set up the MeasureNet workstation to record a titration curve. a. Press On/Off button to turn on the MeasureNet workstation. b. Press Main Menu , then press F3 pH/mV , then press F2 pH vs. Volume . c. Press Calibrate . Measure the temperature of the buffer solution using a thermometer, enter the temperature into the workstation, then press Enter . d. Enter 7.00 when asked for the pH of the buffer, press Enter . When the pH value stabilizes, press Enter . Press F1 . Press Display . e. Remove the pH electrode from the buffer solution, rinse it with water and wipe it with Kimwipes. 6. Transfer 10-15mL of the baking soda solution to a 140mL beaker. Add water to the 140mL beaker until it covers the tip of the pH electrode (1.5 cm of the tip should be submerged). Place the magnetic stir bar in the beaker. 7.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 8

Exp15proposal - Determination of the Purity of the Baking...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online