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October 2, 2014

Homework Help: Chemistry

Posted by May on Monday, October 11, 2010 at 4:42pm.

A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.37 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution?
Answer in units of M.

Okay heres my work:

9.4/40(MM)= .235
.250x .693=.17325

added togehter= .40825

2.37 gallons= 8971.4259 mL

.40825/8971.4259= .000045506 but my answers wrong.

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