Problem: A solution of HNO3 is standardized by reaction with pure sodium carbonate.2H+ + Na2CO3 → 2Na+ + H2O + CO2 A volume of 25.36  0.06mL of HNO3 solution was required for complete reaction with 0.9572  0.0008 g of Na2CO3 (FM 105.988  0.001). Find the molarity of the HNO3 and its absolute uncertainty.

FREE Expert Solution

At equivalence point:

mole acid=mole base

mole acid =0.9572 g±0.0008 g Na2CO3(1 mol Na2CO3105.988±0.001 g Na2CO3)=0.00903±0.0018 mol

Solve for molarity of acid (i.e HNO3):

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Problem Details

A solution of HNO3 is standardized by reaction with pure sodium carbonate.

2H+ + Na2CO3 → 2Na+ + H2O + CO

A volume of 25.36  0.06mL of HNO3 solution was required for complete reaction with 0.9572  0.0008 g of Na2CO3 (FM 105.988  0.001). Find the molarity of the HNO3 and its absolute uncertainty.

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