Consider the following data:HX→ X- + H+Ką = 6.61 · 10- 5H2A +НА + Н +Ka = 2.68 · 10-7Calculate the Keg for the following reaction:H2A + X¯ + HA¯ +HXRecord your answer in scientific notation to 3 sig figs. Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.97 M phosphoric acidsolution is prepared. Calculate the equilibrium concentrations of the species indicated. Report allanswers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can makeassumptions like we do in class (ie if K<<1, then 0.1-x - 0.1)H3PO4H20 →H2PO,H30+7.5x10-3Kal++H2PO,H20 +НРОH30+Ka2 = 6.2x10++4HPO;-H20 +PO-Ka3 = 4.8x10-13H30+++4What is the pH of this solution?Report pH as a number and not inscientific notation.

Answered: Image /qna-images/answer/aefefffd-c487-467d-9f84-90bd4319cde3.jpg

Answered: HX → X- + H+ Ka = 6.61 · 10-5 H2A ty…

HX → X- + H+ Ka = 6.61 · 10-5 H2A ty НА- + н+ Ka = 2.68 · 10-7 Calculate the Keg for the following reaction: H2A + X¯ + HÀ¯ +HX Record your answer in scientific notation to 3 sig figs.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 120QRT

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Concept explainers

Diol

In chemistry there are so many chemical compounds that have a hydroxyl group but a chemical compound having two hydroxyl groups (-OH) is termed as a diol. It also implies the presence of two alcohols whereas polyols contain two or more than two hydroxyl groups (-OH). Glycol or 1,2-diol is an aliphatic diol that has two alcohol groups on adjacent carbon atoms. In industries, the most commonly used diol is ethylene glycol.

Question

Consider the following data:
HX
→ X- + H+
Ką = 6.61 · 10- 5
H2A +
НА + Н +
Ka = 2.68 · 10-7
Calculate the Keg for the following reaction:
H2A + X¯ + HA¯ +HX
Record your answer in scientific notation to 3 sig figs.

Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.97 M phosphoric acid
solution is prepared. Calculate the equilibrium concentrations of the species indicated. Report all
answers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make
assumptions like we do in class (ie if K<<1, then 0.1-x - 0.1)
H3PO4
H20 →
H2PO,
H30+
7.5x10-3
Kal
+
+
H2PO,
H20 +
НРО
H30+
Ka2 = 6.2x10
+
+
4
HPO;-
H20 +
PO-
Ka3 = 4.8x10-13
H30+
+
+
4
What is the pH of this solution?
Report pH as a number and not in
scientific notation.

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