Friday

March 6, 2015

March 6, 2015

Posted by **sp** on Wednesday, September 8, 2010 at 8:52pm.

- chemistry -
**DrBob222**, Wednesday, September 8, 2010 at 11:06pmTechnically, I don't think the problem can be worked exactly because the volumes may/may not be additive but here is what I would do.

mL x N = mL x N

11.0 x 0.1 = 5N

Solve for N = 0.22N which is

0.22 me/mL or 0.22 me/mL x 1000 mL = 220 me in the 1 L.

We want 0.25N which is

0.25 me/mL x 1000 or 250 me in the 1L.

The difference is 250-220 = 30 milliequivalents.

Now back to the mL x N = mL x N

?mL x 15.8 = 30

solve for ?mL.

The glitch is that if this is ADDED to 1L of the 0.22N stuff, the total volume will not be 1L, rather it will be 1 L + the volume of 15.8N HNO3 added. If I work it out the final concn ends up being 0.2495, which to two significant figures (the 0.10N has two s.f.) that rounds to 0.25 N.

**Answer this Question**

**Related Questions**

chemistry,math - One liter of approximetely 0.25N HNO3 has been prepared. Upon ...

math,science,lab - One liter of approximetely 0.25N HNO3 has been prepared. Upon...

Chemistry II - What volume of .0500 M calcium hydroxide is required to ...

college chemistry - Suppose you have a 0.200 M solution of the nitrogen-...

chemistry - in HNO3 titration, you add few drops of phenolphthalein indicator to...

Chemistry - HNO3 used as a reagent has a specific gravity of 1.42 g/ mL and ...

Science(Chemsitry) - HNO3 used as a reagent has specific gravity of 1.42g/ml and...

johnson - Work these titration calculations: 1. A titration of 15.0 cm3 of ...

chemistry - How would you make up 255 mL of 0.150 M HNO3 from nitric acid that ...

Chemistry, #4 - Calculate the concentration of an aqueous HNO3 solution that has...