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How many grams of dipotassium oxalate (FM 166.22) should be added to 20.0 mL of 0.800...

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Chemistry

How many grams of dipotassium oxalate (FM 166.22) should beadded to 20.0 mL of 0.800 M HClO4 to give a pHof 4.40 when the solution is diluted to 450. mL?(pKa1 = 1.27 and pKa2 =4.266)
?g

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Given that If the final pH is 440 thats is near to the pKa2 for H2C2O4 The HendersonHasselbalch equation for this buffer is pH pKa log C2O4 2 HC2O4 440 4266 log C2O4 2 HC2O4 log C2O4 2 HC2O4 0134 C2O4 2 HC2O4 136 If we add K2C2O4    See Answer
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