[mass]

 

Solution S is prepared by dissolving 2.5g sample in 20ml 0.1M HN03 and making up to 50ml with water. 15ml of Solution S when treated with 1m 2M HN03 and 1ml AGNO3 produces no more opalescence than 10ml 5ppm chloride standard solution and 5ml water when treated with the same reagents. Calculate maximum level of chloride in the sample.

Anyone take me through how to do this, I have tried and tried and have had no success

[ARGOS++]

Dear mass;

As usually!:  Please show us your work that we can see where the troubles occur.

Good Luck!
                    ARGOS⁺⁺

[Arkcon]

Hrm ... I'd like to see what you've tried as well.  Are you having the same problem this time that you were having when you made this post -- http://www.chemicalforums.com/index.php?topic=32174.msg123219#msg123219 -- getting bogged down with words and terms that really don't alter the problem?

[mass]

Hrm ... I'd like to see what you've tried as well.  Are you having the same problem this time that you were having when you made this post -- http://www.chemicalforums.com/index.php?topic=32174.msg123219#msg123219 -- getting bogged down with words and terms that really don't alter the problem?

I just ain't getting anywhere

[ARGOS++]

Dear mass;

So maybe it will be best if we solve this "Chloride-problem" stepwise:
     1.) Can you tell how many mg Chloride correspond to 0.010L of a 5ppm solution?
          (Fortunately the density of such a diluted aqueous solution is 1.00 g/ml.)

Good Luck!
                    ARGOS⁺⁺