Problem: An experiment in chm 2045 requires students to prepare a 1.0 m aqueous solution of potassium phosphate. Jennifer fills a 1.0 liter volumetric flask to the calibration line with water. She then weighs out 212.3 g of potassium phosphate and adds it to the volumetric flask. Joe weighs out 212.3 g of potassium phosphate and adds it to a 1.0 liter volumetric flask. He then fills the volumetric flask to the calibration line with water. Which student has correctly prepared a 1.0 m aqueous solution of potassium phosphate? a) Jennifer b) both c) Joe d) neither

FREE Expert Solution

Molality=moles solute (mol)mass solvent (kg)

Molar Mass of Potassium Phosphate (K3PO4): 212.27 g/mol

Density of Water: 1.00 kg/L

Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume.

The solution prepared by Jennifer:

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Problem Details

An experiment in chm 2045 requires students to prepare a 1.0 m aqueous solution of potassium phosphate. 

Jennifer fills a 1.0 liter volumetric flask to the calibration line with water. She then weighs out 212.3 g of potassium phosphate and adds it to the volumetric flask. 

Joe weighs out 212.3 g of potassium phosphate and adds it to a 1.0 liter volumetric flask. He then fills the volumetric flask to the calibration line with water. 

Which student has correctly prepared a 1.0 m aqueous solution of potassium phosphate? 

a) Jennifer 

b) both 

c) Joe 

d) neither

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