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Chapter 2: Problem 15

Which of the following is true for all bases? (A) All bases donate \(\mathrm{OH}^{-}\) ions into solution. (B) Only strong bases create solutions in which \(\mathrm{OH}^{-}\) ions are present. (C) Only strong bases are good conductors when dissolved in solution. (D) For weak bases, the concentration of the \(\mathrm{OH}^{-}\) ions exceeds the concentration of the base in the solution.

Short Answer

Expert verified
None of the given statements A, B, C, and D are correct for all bases.

Step by step solution

01

Checking Statement A

This statement suggests that all bases donate \(\mathrm{OH}^{-}\) ions into solution. While this is true for many bases, it's not accurate for all since some bases work by accepting protons rather than donating \(\mathrm{OH}^{-}\) ions. So, statement A is incorrect.
02

Checking Statement B

This statement states that only strong bases create solutions in which \(\mathrm{OH}^{-}\) ions are present. This is not true as both weak and strong bases increase the concentration of \(\mathrm{OH}^{-}\) ions, but to different extents depending on their strength. So, statement B is incorrect.
03

Checking Statement C

This statement suggests that only strong bases are good conductors when dissolved in solution. While strong bases do conduct electricity better due to a higher concentration of ions, weak bases can still conduct electricity, although not as efficiently. Thus, statement C is also incorrect.
04

Checking Statement D

This final statement suggests that for weak bases, the concentration of the \(\mathrm{OH}^{-}\) ions exceeds the concentration of the base in the solution. This is not generally true for weak bases. A weak base only partially ionizes in solution, and so the concentration of the base typically exceeds that of the \(\mathrm{OH}^{-}\) ions. Therefore, statement D is also incorrect.

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Most popular questions from this chapter

\(\mathrm{NO}_{2}+\mathrm{O}_{3} \rightarrow \mathrm{NO}_{3}+\mathrm{O}_{2}\) \(\quad\) Slow \(\mathrm{NO}_{3}+\mathrm{NO}_{2} \rightarrow \mathrm{N}_{2} \mathrm{O}_{5}\) \(\quad\) Fast A proposed reaction mechanism for the reaction of nitrogen dioxide and ozone is detailed above. Which of the following is the rate law for the reaction? (A) Rate \(=k\left[\mathrm{NO}_{2}\right]\left[\mathrm{O}_{3}\right]\) (B) Rate \(=k\left[\mathrm{NO}_{3}\right]\left[\mathrm{NO}_{2}\right]\) (C) Rate \(=k\left[\mathrm{NO}_{2}\right]^{2}\left[\mathrm{O}_{3}\right]\) (D) Rate \(=k\left[\mathrm{NO}_{3}\right]\left[\mathrm{O}_{2}\right]\)

20.0 \(\mathrm{mL}\) of 1.0 \(\mathrm{M} \mathrm{Na}_{2} \mathrm{CO}_{3}\) is placed in a beaker and titrated with a solution of \(1.0 \mathrm{M} \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2},\) resulting in the creation of a precipitate. How much \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}\) must be added to reach the equivalence point? (A) 10.0 mL (B) 20.0 mL (C) 30.0 mL (D) 40.0 mL

The bond length between any two nonmetal atoms is achieved under which of the following conditions? (A) Where the energy of interaction between the atoms is at its minimum value (B) Where the nuclei of each atom exhibits the strongest attraction to the electrons of the other atom (C) The point at which the attractive and repulsive forces between the two atoms are equal (D) The closest point at which a valence electron from one atom can transfer to the other atom

Most transition metals share a common oxidation state of \(+2 .\) Which of the following best explains why? (A) Transition metals all have a minimum of two unpaired electrons. (B) Transition metals have unstable configurations and are very reactive. (C) Transition metals tend to gain electrons when reacting with other elements. (D) Transition metals will lose their outermost s-block electrons when forming bonds.

Which of the following pairs of ions would make the best buffer with a pH between 6 and 7? \(K_{\mathrm{a}}\) for \(\mathrm{HC}_{3} \mathrm{H}_{2} \mathrm{O}_{2}=1.75 \times 10^{-5}\) \(K_{\mathrm{a}}\) for \(\mathrm{HPO}_{4}^{2-}=4.8 \times 10^{-13}\) (A) \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and \(\mathrm{H}_{2} \mathrm{PO}_{4}\) (B) \(\mathrm{HPO}_{4}^{2-}\) and \(\mathrm{Na}_{3} \mathrm{PO}_{4}\) (C) \(\mathrm{HC}_{3} \mathrm{H}_{2} \mathrm{O}_{2}\) and \(\mathrm{NaC}_{3} \mathrm{H}_{2} \mathrm{O}_{2}\) (D) \(\mathrm{NaOH}\) and \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\)
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