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An experiment was performed to determine the hydration of chickpeas in a salt solution. Two experimental...

An experiment was performed to determine the hydration of chickpeas in a salt solution. Two experimental conditions were run: 1) room temperature (25.0 oC) with salt concentration of 1.5 M NaCl and 2) 85.0 oC with a salt concentration of 1.5 M NaCl. Determine the osmotic pressure for each of the conditions. Do you calculated answers make sense? Explain.

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Answer #1

1.    = CRT

   T   = 25C = 25 + 273 = 298K

   R    = 0.0821L-atm/mole-K

C      = 1.5 M

      = 1.5*0.0821*298   = 36.7atm

2.    = CRT

   T   = 85C = 85 + 273 = 358K

   R    = 0.0821L-atm/mole-K

C      = 1.5 M

    = 1.5*0.0821*358   = 40.1atm

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