By Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Reach chemistry with CHEMICAL ideas within the LABORATORY, 11th variation! transparent, effortless, and direct, this lab handbook provide you with the instruments you must effectively whole lab experiments and lab reviews. examining the information you become aware of in lab periods is simple with the manual's a number of improve examine Assignments that offer you additional perform with processing facts via pattern questions. moreover, a distinct part indicates you the way to take advantage of Excel to simplify making calculations.
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Extra info for Chemical Principles in the Laboratory
____________ moles Cl− b. What is the molarity of the Cl− ion in the solution? ( MCl− = nCl− / Vsoln ) ____________ M 2. 05273 M AgNO3 to reach the Ag2CrO4 end point. a. How many moles Cl− ion were present in the sample? (Use Eqs. ) ____________ moles Cl− b. How many grams Cl− ion were present? (Use Eq. ) ____________ g Cl− c. What was the mass percent Cl− ion in the sample? (Use Eq. ) ____________ % Cl− 3. How would the following errors affect the mass percent Cl− obtained in Question 2c? Give your reasoning in each case.
At the higher temperatures, the water bath will tend to cool, so you may need to add warm water to make it hold its temperature. Your final level in the right arm should be near the top of the manometer. You should have at least four runs for which you have recorded water levels and temperature. 1 Experiment 8 Verifying the Absolute Zero of Temperature—Determination of the Barometric Pressure 49 You can process the data you have obtained by making a graph of total pressure P vs the Celcius temperature t.
Put a stirring bar in the beaker, and clamp a dry 500-mL Erlenmeyer flask in the beaker as shown. (If the flask is not dry, add a few milliliters of acetone and shake well. ) Fill the beaker with room temperature water which has been stored overnight in the lab. Start the stirrer. If you don’t have a stirrer available, stirring with your stirring rod should be satisfactory, and indeed you should use it in addition to the magnetic stirrer. Connect the short piece of rubber tubing to the glass tubing in the stopper, and then moisten the rubber stopper and insert it firmly into the flask.