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**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:**

$\overline{){\mathbf{mole}}{\mathbf{}}{\mathbf{acid}}{\mathbf{=}}{\mathbf{mole}}{\mathbf{}}{\mathbf{base}}}$

$\mathbf{mole}\mathbf{}\mathbf{acid}\mathbf{}\mathbf{=}\mathbf{0}\mathbf{.}\mathbf{9572}\mathbf{}\mathbf{g}\mathbf{\pm}\mathbf{0}\mathbf{.}\mathbf{0008}\overline{)\mathbf{}\mathbf{g}\mathbf{}{\mathbf{Na}}_{\mathbf{2}}{\mathbf{CO}}_{\mathbf{3}}}\mathbf{\left(}\frac{\mathbf{1}\mathbf{}\mathbf{mol}\mathbf{}{\mathbf{Na}}_{\mathbf{2}}{\mathbf{CO}}_{\mathbf{3}}}{\mathbf{105}\mathbf{.}\mathbf{988}\mathbf{\pm}\mathbf{0}\mathbf{.}\mathbf{001}\mathbf{}\overline{)\mathbf{g}\mathbf{}{\mathbf{Na}}_{\mathbf{2}}{\mathbf{CO}}_{\mathbf{3}}}}\mathbf{\right)}\mathbf{=}$**0.00903±0.0018 mol**

**Solve for molarity of acid (i.e HNO _{3}):**

###### Problem Details

A solution of HNO_{3} is standardized by reaction with pure sodium carbonate.

2H^{+} + Na_{2}CO_{3} → 2Na^{+} + H_{2}O + CO_{2 }

A volume of 25.36 0.06mL of HNO_{3} solution was required for complete reaction with 0.9572 0.0008 g of Na_{2}CO_{3} (FM 105.988 0.001). Find the molarity of the HNO_{3} and its absolute uncertainty.

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