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Chapter 4: Problem 82

Identify the type of aqueous reaction using the symbols PPT for precipitation, SA/SB for strong acid-strong base, SA/WB for strong acid-weak base, WA/SB for weak acid-strong base, and NR for no reaction. (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}+\mathrm{HCl}\) (b) \(\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{HF}\) (c) \(\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{Na}_{3} \mathrm{PO}_{4}\) (d) \(\mathrm{Ag}_{2} \mathrm{SO}_{4}+\mathrm{BaCl}_{2}\) (e) \(\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{NaCl}\)

Short Answer

Expert verified
Question: Identify the type of aqueous reaction that occurs in each of the following combinations: (a) CH3CH2NH2 + HCl (b) Ca(OH)2 + HF (c) Ca(OH)2 + Na3PO4 (d) Ag2SO4 + BaCl2 (e) Mg(NO3)2 + NaCl Answer: (a) Strong acid-weak base (SA/WB) reaction (b) Weak acid-strong base (WA/SB) reaction (c) Precipitation (PPT) reaction (d) Precipitation (PPT) reaction (e) No reaction (NR)

Step by step solution

01

(a) Reaction Type: CH3CH2NH2 + HCl

Since HCl is a strong acid and CH3CH2NH2 is a weak base (an amine), this reaction corresponds to a strong acid-weak base (SA/WB) reaction.
02

(b) Reaction Type: Ca(OH)2 + HF

Ca(OH)2 is a strong base while HF is a weak acid. Therefore, this reaction is classified as a weak acid-strong base (WA/SB) reaction.
03

(c) Reaction Type: Ca(OH)2 + Na3PO4

Both Ca(OH)2 and Na3PO4 are soluble ionic compounds. In this case, the reaction will produce Ca3(PO4)2, which is insoluble. Since a solid is formed, this will be a precipitation (PPT) reaction.
04

(d) Reaction Type: Ag2SO4 + BaCl2

Again, both Ag2SO4 and BaCl2 are soluble ionic compounds. The reaction will produce AgCl, which is insoluble, forming a solid. Thus, this reaction is a precipitation (PPT) reaction.
05

(e) Reaction Type: Mg(NO3)2 + NaCl

In this reaction, both Mg(NO3)2 and NaCl are soluble, and there is no solubility change in the products as both MgCl2 and NaNO3 are also soluble. There is no solid formed, nor acids and bases participating. Therefore, this reaction is classified as no reaction (NR).

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Most popular questions from this chapter

Hydrogen gas is bubbled into a solution of barium hydroxide that has sulfur in it. The unbalanced equation for the reaction that takes place is $$ \mathrm{H}_{2}(g)+\mathrm{S}(s)+\mathrm{OH}^{-}(a q) \longrightarrow \mathrm{S}^{2-}(a q)+\mathrm{H}_{2} \mathrm{O} $$ (a) Balance the equation. (b) What volume of \(0.349 \mathrm{M} \mathrm{Ba}(\mathrm{OH})_{2}\) is required to react completely with \(3.00 \mathrm{~g}\) of sulfur?

III Classify each of the following half-reactions as oxidation or reduction. (a) \(\mathrm{O}_{2}(g) \longrightarrow \mathrm{O}^{2-}(a q)\) (b) \(\mathrm{MnO}_{4}^{-}(a q) \longrightarrow \mathrm{MnO}_{2}(s)\) (c) \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(a q) \longrightarrow \mathrm{Cr}^{3+}(a q)\) (d) \(\mathrm{Cl}^{-}(a q) \longrightarrow \mathrm{Cl}_{2}(g)\)

Classify each of the following half-reactions as oxidation or reduction. (a) \(\mathrm{TiO}_{2}(s) \longrightarrow \mathrm{Ti}^{3+}(a q)\) (b) \(\mathrm{Zn}^{2+}(a q) \longrightarrow \mathrm{Zn}(s)\) (c) \(\mathrm{NH}_{4}{ }^{+}(a q) \longrightarrow \mathrm{N}_{2}(g)\) (d) \(\mathrm{CH}_{3} \mathrm{OH}(a q) \longrightarrow \mathrm{CH}_{2} \mathrm{O}(a q)\)

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