A buffer is made by dissolving H3PO4 and NaH2PO4 in water.
Write an equation that shows how this buffer neutralizes added base.

Answers

Answer 1

This reaction can be represented by the following equation: H₃PO₄ + OH⁻ → H₂PO₄⁻ + H₂O

What is buffer solution?

Buffer solution resists the changes in pH when small amounts of acid/ base are added.

In the case of buffer made from H₃PO₄ and NaH₂PO₄, the H₃PO₄ will act as weak acid, and NaH₂PO₄ will act as its conjugate base.

When base is added to this buffer solution, it will react with weak acid (H₃PO₄) to form its conjugate base (H₂PO₄⁻ ) and water (H₂O). The H₂PO₄⁻ ion will then act as weak acid and react with any additional base added to buffer. This reaction can be represented by the following equation: H₃PO₄ + OH⁻  → H₂PO₄⁻  + H₂O

OH⁻  represents any hydroxide ion that may be added to the buffer solution.

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