Homework Answers
a. Buret is the best choice for measuring 10 mL reagent since measuring 10 mL is easier by using buret but with volumetric flask it is difficult to take solution compared to buret.
b. For dilution purpose the reagent is taken in a volumetric flask and add water to the mark of the volumetric flask so it is easy with volumetric flask.
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Both the volumetric flask and the buret can measure 10.00 mL with the same uncertainty 5. Which is the better choic...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You measure the volume of water contained in the flask by measuring the mass of the empty flask, the mass of the flask filled with water, taking the difference, correcting for the buoyancy factor, and dividing by the density of the water. The results of eight such measurements are given in the table 10.064 10.063 10.017 10.049 10.020 10.025 10.045 10.008 2 3 4 5...
can someone help me with the first and the second matching questions A 10.00 ml pipette...
can someone help me with the first and the second matching
questions
A 10.00 ml pipette delivers portions of a diluted vinegar solution into 3 separate Erlenmeyer flasks, then the acetic acid is titrated using a standard solution of 0.060 M NaOH to a phenolphthalein end point. The results of the three trials are given below. What was the average M (mol/L) of the diluted vinegar? Trial # Vinegar Volume (mL) Initial Buret Volume (mL) Final Buret Volume (mL) 1...
Procedure 1. Label four 50.0 mL volumetric flasks.)! through 4 2. Using a buret, add 10.00 ml of ...
Procedure 1. Label four 50.0 mL volumetric flasks.)! through 4 2. Using a buret, add 10.00 ml of 2.00x10'MFeNO)D solution to each of the flasks 3. Using a buret, add 1.00 mL. 2.00 mL, 3.00 mL, and 4.00 mL of 2.00x 10 MKSCN 4. Fill each flask to the mark with 0.10 M HNO, solution. Stopper each flask and invert 5. Measure the absorbance of each solution at a wavelength of 447 nm (the absorbance reterred to in step 1...
1. You prepare a mixture to use to create a colorimetry calibration curve for FeSCN2+ by...
1. You prepare a mixture to use to create a colorimetry calibration curve for FeSCN2+ by mixing these things in a 25.00 mL volumetric flask and then diluting to the volume of the flask with 0.3 M HNO3. 5.00 mL 0.00200 M NaSCN 10.00 mL 0.30 M Fe(NO3)3 What is the concentration of FeSCN2+ in this mixture? [Pay attention to the values to determine which reactant is being driven to completely react...] 2. You prepare a mixture to use to...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask,...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask, adds enough water to dissolve the solid and then adds water to the 300 mL mark on the neck of the flask. Calculate the concentration (in molarity units) of aluminum bromide in the resulting solution? Calculate the mass, in grams of sodium iodide that must be added to a 250 mL volumetric flask in order to prepare 250 mL of a 0.138 M aqueous...
1) Suppose you added 100 mL of water to your vinegar sample in the Erlenmeyer flask...
1) Suppose you added 100 mL of water to your vinegar sample in the Erlenmeyer flask instead of 50 mL. Would the titration have required more, less or the same amount of NaOH for a complete reaction? Explain. 2)You used a 10.00 mL volumetric pipet to dispense the vinegar sample. Can you use a cylinder instead if it has the same precision?
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret...
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret b. wash bottle f. balance c. Erlenmeyer flask g. volumetric flask d. pipet h. cap 1. device used to measure masses of solid compounds f = balance - _ 2. contains distilled water used to top up the last tiny volume of a solution - SE 3. device used to measure volumes with fairly accurate results ds Pipet 4. container that has an accurate...
a.)Suppose you were preparing 1.0 L of a bleaching solution in a volumetric flask, and it...
a.)Suppose you were preparing 1.0 L of a bleaching solution in a volumetric flask, and it calls for 0.26 mol of NaOCl. If all you had available was a jug of bleach that contained 0.74 M NaOCl, what volume of bleach would you need to add to the volumetric flask before you added enough water to reach the 1.0 L line? Express the volume in milliliters to two significant figures b.) You need to prepare a 2.40 M solution of...
(12 pts.) The principal investigator (PI) for the laboratory you are doing research in has tasked...
(12 pts.) The principal investigator (PI) for the laboratory you are doing research in has tasked with you to make 100 mL of an aqueous sodium phosphate (Na3PO4) solution with a formal concentration of 10.00 mM. Proceed through the following steps to quantify the concentration and uncertainty for the solution you produce. Note: for molar masses use the following values (Na = 22.98976928(2), P = 30.973762(2), O = 15.9994(4) g/mol) And propagate uncertainty for molar masses of compounds as standard...
A 250 mL flask contains air at 1.061 atm and 20.3 °C. 5 mL of ethanol...
A 250 mL flask contains air at 1.061 atm and 20.3 °C. 5 mL of ethanol is added, the flask is immediately sealed and then warmed to 93.3 °C, during which time a small amount of the ethanol vaporizes. The final pressure in the flask (stabilized at 93.3 °C) is 2.833 atm. (Assume that the head space volume of gas in the flask remains constant.) a. What is the partial pressure of air, in the flask at 93.3 °C? 1homework...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You measure the volume of water contained in the flask by measuring the mass of the empty flask, the mass of the flask filled with water, taking the difference, correcting for the buoyancy factor, and dividing by the density of the water. The results of eight such measurements are given in the table 10.064 10.063 10.017 10.049 10.020 10.025 10.045 10.008 2 3 4 5...
can someone help me with the first and the second matching
questions
A 10.00 ml pipette delivers portions of a diluted vinegar solution into 3 separate Erlenmeyer flasks, then the acetic acid is titrated using a standard solution of 0.060 M NaOH to a phenolphthalein end point. The results of the three trials are given below. What was the average M (mol/L) of the diluted vinegar? Trial # Vinegar Volume (mL) Initial Buret Volume (mL) Final Buret Volume (mL) 1...
Procedure 1. Label four 50.0 mL volumetric flasks.)! through 4 2. Using a buret, add 10.00 ml of 2.00x10'MFeNO)D solution to each of the flasks 3. Using a buret, add 1.00 mL. 2.00 mL, 3.00 mL, and 4.00 mL of 2.00x 10 MKSCN 4. Fill each flask to the mark with 0.10 M HNO, solution. Stopper each flask and invert 5. Measure the absorbance of each solution at a wavelength of 447 nm (the absorbance reterred to in step 1...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask, adds enough water to dissolve the solid and then adds water to the 300 mL mark on the neck of the flask. Calculate the concentration (in molarity units) of aluminum bromide in the resulting solution? Calculate the mass, in grams of sodium iodide that must be added to a 250 mL volumetric flask in order to prepare 250 mL of a 0.138 M aqueous...
Match the piece of solution lab equipment with its use below. a. graduated cylinder e. buret b. wash bottle f. balance c. Erlenmeyer flask g. volumetric flask d. pipet h. cap 1. device used to measure masses of solid compounds f = balance - _ 2. contains distilled water used to top up the last tiny volume of a solution - SE 3. device used to measure volumes with fairly accurate results ds Pipet 4. container that has an accurate...
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