The uses of sodium phosphate include clarifying crude sugar, manufacturing paper, removing boiler scale, and washing concrete. W

Question

2 years ago

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hat is the pH of a solution containing 33 g of Na_3PO_4 per liter? What is [OH⁻] of this solution?

1 answer:

garri49 [273] · Answer 1 · 2023-09-16T23:43:56+03:00

2.4 × 10⁻² is the pH of a solution

What is the short definition of pH?

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7.
In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

Equation representing the i onization of Na₃PO₄ is as fallow

Na₃PO₄ → PO₄³⁻ + 3Na⁺

Concentration of Na₃PO₄ = $\frac{26.9 * \frac{1 mol}{164 g} }{1 L} = 0.164 M$

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

Learn more about pH

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