The uses of sodium phosphate include clarifying crude sugar, manufacturing paper, removing boiler scale, and washing concrete. What is the pH of a solution containing 33 g of Na_3PO_4 per liter? What is [OH⁻] of this solution?

The pH scale determines whether water is basic or acidic. Neutrality is represented by 7 on the scale, which ranges from 0 to 14.
Acidity is indicated by pH values below 7, whereas baseness is suggested by pH values above 7. The concentration of free hydrogen and hydroxyl ions in water is really measured by the pH scale.

Equation representing the i onization of Na₃PO₄ is as fallow

Na₃PO₄ → PO₄³⁻ + 3Na⁺

Concentration of Na₃PO₄ = [tex]\frac{26.9 * \frac{1 mol}{164 g} }{1 L} = 0.164 M[/tex]

Since 1 mol of Na₃PO₄ forms 1 mol of PO₄³⁻ [ PO₄³⁻ ] = [ Na₃PO₄ ] = 0.164 M

Equation representing the i onization of HPO²⁻₄ is as fallow

HPO²⁻₄ → PO₄³⁻ + H⁺

Acidionization constant Ka₃ of HPO²⁻₄ = 4. 17 × 10⁻¹³

Baseionization constant Kb₃ of PO₄³⁻ = Ka₃/ Kb₃

= 1 .0 × 10⁻¹⁴/ 4. 17 × 10⁻¹³ = 2.4 × 10⁻²

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