4. you are preparing 250 ml of gel mix for protein electrophoresis, which requires a final concentration of 1.6% sds. the lab has a 10% stock solution of sds. how much sds stock solution (in ml) do you use? round your answer to the nearest whole number. (ch. 2.1)

40 mL

Explanation:

To prepare a solution by a concentrated solution, we must use the equation:

C1xV1 = C2xV2

Where C is the concentration, V the volume, 1 is the initial solution and 2 the final solution. So, the final volume will be 250 mL, with 1.6% of concentration:

10xV1 = 1.6x250

V1 = 40 mL

So, it's necessary 40 mL of the SDS stock solution.

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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