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Determining the Highest pH for Acid Solutions
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[QUOTE="symbolipoint, post: 6144601, member: 58864"] The values for pK[SUB]a[/SUB] come from the acids' K[SUB]a[/SUB] values. The "p" part of the constant means, "negative logarithm of...". Two specific examples: Acetic Acid, K[SUB]a[/SUB]=1.8*10^(-5), pK[SUB]a[/SUB]=4.756, weak monoprotic acid Oxalic Acid, K[SUB]a1[/SUB]=5.37*10^(-2), pK[SUB]a1[/SUB]=1.27, diprotic acid, not so weak compared to Acetic Each if dissolved to the same molarity will show less acidic for Acetic than for Oxalic; Meaning LOWER pH for Acetic than for the stronger Oxalic. The Acetic Acid solution will have the higher pH, of the two solutions. You can make your predictions using the pK[SUB]a[/SUB] values or using the K[SUB]a[/SUB] values. Higher pKa, higher pH of the acid in solution, lower acidity in solution [/QUOTE]
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Determining the Highest pH for Acid Solutions
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