Please see screenshot for question **13. Calculate the PH of a 0.1M HA solution. \( K_a \) for HA is \( 7.2 \times 10^{-5} \).**- **A** 2.1- **B** 4.0- **C** None of the others- **D** 2.3---**14. Give the positive root for the following quadratic formula:**\[ x^2 + 5.5 \times 10^{-11} \cdot x - 5.5 \times 10^{-12} = 0 \]- **A** None of the others- **B** 5.6- **C** 4.6- **D** 5.1- **E** 4.1---**15. The PH of a 0.1M HF/0.1M NaF \((K_a\) for HF is \(7.2 \times 10^{-5}\)) buffer solution is:**- **A** None of the others- **B** 3.1- **C** 6.1- **D** 5.1- **E** 4.1---**16. The expression of \( K_{sp} \) for \( \text{Ni(OH)}_2 \) is:**- **A** \([\text{Ni}^{2+}] \cdot [\text{OH}^-]^2\) - **B** \([\text{Ni}^{2+}]^2 \cdot [\text{OH}^-]^2\)- **C** None of the others- **D** \([\text{Ni}^+] \cdot [\text{OH}^-]\)---**17. The solubility equilibrium for \( \text{Mn(IO}_3)_2 \) is:**- **A** None of the others- **B** \( \text{Mn(IO}_3)_2(s) \rightleftharpoons \text{Mn}^{2+}_{(aq)} + 2\text{IO}_3^-_{(aq)} \)- **C** \( \text{Mn(IO}_3)_2(s) \rightleftharpoons \text{Mn}_{(aq)}^{+}

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Answered: 13. Calculate the PH of a 0.1M HA…

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13. Calculate the PH of a 0.1M HA solution. Ka for HA is 7.2 x 10-5 |4.0 ONone of the others 2.1 ]2.3 26

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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