BASIC chemistry question--please help!?

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alina

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Chemistry question--help!?
You need to prepare 25 ml of solution A for your experiment. According to the lab recipe, the composition of solution A is:

10mM Tris-Hcl pH 8.0
5mM EDTA

You found the following sterile stock solutions in the lab: one is 0.5 M Tris Hcl pH 8.0 solution, and the other is 0.1 M EDTA pH 8.0 There is also sterile water and bottles and you won't need to autoclave solution A.

To make 25ml of solution A, using the 0.5 M Tris Hcl pH 8.0 and 0.1 EDTA pH 8.0 solutions, you should add to the sterile bottle:

_____ml of the Tris Hcl solution
_____ml of EDTA stock solution.

Then, add sterile water to adjust the volume to 25ml.

Please show your work!

Thanks!!
 
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