Problem: You have to prepare a pH 3.60 buffer, and you have the following 0.10 M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH3COONa, and NaH2PO4.How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?

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FREE Expert Solution

We are being asked the amount in milliliters of 0.10 M HCOOH and 0.10 M HCOONa to make one-liter of the buffer with pH 3.60.

HCOOH is a weak acid (and based on the Bronsted-Lowry definitionan acid is a proton (H+) donor. Once HCOOH loses its proton, its conjugate base is formed).

HCOOH(aq)   +      H2O(l)            HCOO-(aq)     +      H3O+(aq)

(weak acid)            (base)         (conjugate base)    (conjugate acid)

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Problem Details

You have to prepare a pH 3.60 buffer, and you have the following 0.10 M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH3COONa, and NaH2PO4.

How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?

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What scientific concept do you need to know in order to solve this problem?

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Co's class at OSU.