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13 Dec 2019
Which of the following combinations would be best to buffer an aqueous solution at a pH of 2.0?
a. H3PO4 and H2PO4-, Ka1 = 7.5 x 10-3
b. HNO2 and NO2-, Ka = 4.5 x 10-4
c. CH3COOH and CH3COO-, Ka = 1.8 x 10-5
d. H2PO4- and HPO42-, Ka2 = 6.2 x 10-8
Which of the following combinations would be best to buffer an aqueous solution at a pH of 2.0?
a. H3PO4 and H2PO4-, Ka1 = 7.5 x 10-3
b. HNO2 and NO2-, Ka = 4.5 x 10-4
c. CH3COOH and CH3COO-, Ka = 1.8 x 10-5
d. H2PO4- and HPO42-, Ka2 = 6.2 x 10-8
Jean KeelingLv2
17 Dec 2019
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