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A 0.588 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 23.0 mL. The solution is then titrated with a saturated calcium hydroxide solution.
Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points.
The pH after adding 23.0 mL of the base was 3.82. Find the value of pKa1.
The pH after adding 17.0 mL past the first equivalence point was 8.19. Find the value of pKa2.
which of the following has the greatest effect on the rate of chemical cycling in an ecosystem?
Which of the following statements about proteins aretrue?
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how The sex of a human is determined
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