Which of the salt solutions was most likely isotonic relative to the intracellular fluids of the potato?

Isotonic solutions are the solutions which have same salt concentration or having same osmotic pressure across the semi-permeable membrane.

Now, as we know, the molarity of intracellualar fluids of potato is approximately equals to 0.2 M. Hence, the salt solution should have approximately 0.2 M concentration in order to achieve same osmotic pressure.

Molecular mass of salt (NaCl) = 58.44 g/mol

Molarity = 0.2 M

Volume of solution = 100 ml

Now, molarity = x

Hence, 0.2 = (given masss)/58.44 x (1000/100)

11.688/10 = given mass

Given mass = approx 1.17 gm

Hence, 1.17 % salt solution would most likely to be isotonic to the intracellular fluids of potato.

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