Question

You have a 5.0 ml sample of a protein in 0.5M NaCl. You place the protein/salt sample inside dialysis tubing and place the bag in a large beaker of distilled water. Your goal is to remove as much NaCl from the sample as possible. Since you know that the final salt concentration will be the same inside the tubing as out, you can calculate the final concentration of the salt. a) If you decide to place the dialysis bag in 4.0 L of distilled water for 12 h the final concentration of the salt would be _1 mM. b) What would the final salt concentration be if instead of placing the dialysis bag in 4.0 L of distilled water for 12 h, you placed the bag in 1.0 L of distilled water for 6.0 h and then in another 1.0 L of fresh distilled water for another 6.0 h? It would be _1 mM.

          You have a 5.0 ml sample of a protein in 0.5M NaCl. You place
the protein/salt sample inside dialysis tubing and place the bag in
a large beaker of distilled water. Your goal is to remove as much
NaCl from the sample as possible. Since you know that the final
salt concentration will be the same inside the tubing as out, you
can calculate the final concentration of the salt.
a) If you decide to place the dialysis bag in 4.0 L of distilled
water for 12 h the final concentration of the salt would be
_______*1 mM. 
b) What would the final salt concentration be if instead of
placing the dialysis bag in 4.0 L of distilled water for 12 h, you
placed the bag in 1.0 L of distilled water for 6.0 h and then in
another 1.0 L of fresh distilled water for another 6.0 h? It would
be _______*1 mM.

Added by Josefina B.

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