HOW MUCH MOLARITY OF STANDARD CONCENTRATED ACIDS (Orthophosphoric Acid) AND FORMULA TO MEASURE THEM

HOW MUCH MOLARITY OF STANDARD CONCENTRATED ACIDS 
(Orthophosphoric Acid)
AND FORMULA  TO MEASURE THEM
Following Values are Required of concentrated solutions  :
Molecular Formula
Molecular Weight
Assay or Purity of Acid
Weight per ml of Acid

Formula:-                 1000ml x Wt.per ml x Purity of Conc. Solution
                                                    Molecular weight x 100
                                   = ? M

Example :- For Orthophosphoric Acid 85.0 %w/w
Following Values are Required of concentrated solutions  :
Molecular Formula                       = H3PO4
Molecular Weight                         = 97.995
Assay or Purity of Compound    = 85.0%w/w
Weight per ml of compound      = 1.7

Put the given values in following formula
Formula:-                 1000ml x Wt.per ml x Purity of Conc. Solution
                                                    Molecular weight x 100
                               = ? M
                               =    1000ml x 1.7 x  85.0
                                            97.995 x 100
                               = 14.745 M
Concentrated Orthophosphoric Acid 85.0 %w/w is about 14.745 M
14.745 M                = 1000 ml Conc Orthophosphoric Acid 85.0 %w/w
For 1M                  = 1000 ml Conc. Orthophosphoric Acid 85.0 %w/w
                                                     14.745 
                                  = 67.82 ml Orthophosphoric Acid 85.0 %w/w Required

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