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Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as...

Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H2C2O4

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Expert Solution

Lets start by writing a balanced chemical equation for the titration/ neutralization process:

                     H2C2O4.2H2O + Ba(OH)2 = BaC2O4 + 4H2O

1 mole H2C2O4.2H2O = 1 mole Ba(OH)2 = 126g H2C2O4.2H2O

Equality of mass and volume:

0.896g H2C2O4.2H2O = 0.0382 L Ba(OH)2

Our goal = mol Ba(OH)2/L Ba(OH)2 = Molarity of Ba(OH)2

Now lets set up the given values and calculate the unknown:

     1mol Ba(OH)2                   0.896 g H2C2O4.2H2O
------------------------------- x  ---------------------------- = 0.186 mol/L Ba(OH)2
126 g H2C2O4.2H2O               0.0382 L Ba(OH)2

The molarity of barium hydroxide is 0.186 M.

queen_honey_blossom answered 1 year ago
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