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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: miguel_91 on January 13, 2009, 02:27:05 PM

Title: Basic question about molarity
Post by: miguel_91 on January 13, 2009, 02:27:05 PM

Hi boys I need help I cant find what does happen to the molarity in the solution made up from two other solutions with 0.40M one and the other with 1.20M.

So the question is If I add two solutions knowing their molarity what is the molarity of the solution produced?

Sorry for my english.

Title: Re: Basic question about molarity
Post by: typhoon2028 on January 13, 2009, 02:36:00 PM

It will depend on the amount of each of the two solutions.

For example:
If 500 mL is of 0.4M solution is combined with 500 mL of 1.2M, the resultant solution will be 0.8M.

Calculate by percentages:
Total new solution = 1,000 mL
500 mL = 50%
50% x 0.4 = 0.2
50% x 1.2 = 0.6
0.6 + 0.2 = 0.8

Title: Re: Basic question about molarity
Post by: Borek on January 13, 2009, 02:37:59 PM

http://www.chembuddy.com/?left=concentration&right=dilution-mixing