An experiment was performed to determine the hydration of ch

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.

Solution

1)

   for NaCl ,   i = 2

Temeprature = 25 + 273 = 298 K

osmotic pressure =   i M R T

                             = 2 x 1.5 x 0.0821 x 298

                            = 73.4 atm

osmotic pressure = 73.4 atm

2)

temperature = 85 + 273 = 358 K

osmotic pressure =   i M R T

                             = 2 x 1.5 x 0.0821 x 358

                            = 88.2 atm

osmotic pressure = 88.2 atm

yes these answers are make sense because if temperature increases osmotic pressure also increases