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Chapter 10: Q.10.101 (page 360)

For each of the following: (10.2,10.3)
1. $H_{2} S$ 2. $H_{3} P O_{4}$
a. Write the formula for the conjugate base.
b. Which is the weaker acid?

Short Answer

Expert verified

Part (a) . For $H_{2} S$ - $H S^{-}$ and for $H_{3} P O_{4}$ - $H_{2} P {O_{4}}^{-}$

Part (b) . $H_{2} S$ is weaker

Step by step solution

01

Information Part (a)

A conjugate acid-base pair comprises two substances that vary exclusively by the presence of a proton (H鈦�). A conjugate acid is framed when a proton is added to a base, and a conjugate base is shaped when a proton is eliminated from an acid.

02

Explanation Part (a)

A conjugate base is shaped when a proton is eliminated from an acid.

Hence,

The conjugate base of $H_{2} S$ is $H S^{-}$ due to the loss of one $H^{+}$ ion.

The conjugate base of $H_{3} {PO}_{4} is H_{2} {PO}_{4}^{鈭�}$ due to the loss of one $H^{+}$ ion.

03

Explanation Part (b)

A stronger conjugate base means a weak acid.

Thus,

H_{2} S

is the weaker acid as

H S^{-}

is a stronger conjugate base than

H_{2} P {O_{4}}^{-}

.

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Most popular questions from this chapter

Identify each of the following as an acid or a base; (10.1)

A. $Sr (OH)_{2}$ $Sr (OH)_{2}$

B. $H_{2} {SO}_{3}$

C. ${HC}_{2} H_{3} O_{2}$

D. $CsOH$

Indicate whether each of the following solutions is acidic, basic, or neutral:

a. $[H_{3} O^{+}] = 2.0 脳 10^{- 5} M$

b. $[H_{3} O^{+}] = 1.4 脳 10^{- 9} M$

c. $[{OH}^{-}] = 8.0 脳 10^{- 3} M$

d. $[{OH}^{-}] = 3.5 脳 10^{- 10} M$

Determine if each of the following diagrams represents a strong acid or a weak acid. The acid has the formula HX. (10.3)

Balance each of the following neutralization equations:

a. $HCl (a q) + Mg (OH)_{2} (s) 鉄� H_{2} O (l) + {MgCl}_{2} (a q)$

b. localid="1654005351289" $H_{3} {PO}_{4} (a q) + LiOH (a q) 鉄� H_{2} O (l) + {Li}_{3} {PO}_{4} (a q)$

Identify the weaker acid in each of the following pairs:

a. $HCl$ or ${HSO}_{4}^{-}$

b. ${HNO}_{2}$ or $HF$

c. ${HCO}_{3}^{-}$ or ${NH}_{4}^{+}$

See all solutions

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