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Chapter 10: Q.10.89 (page 359)

Identify each of the solutions in problem 10.87 as acidic, basic, or neutral.

Short Answer

Expert verified

a.Neutral

b.acidic

c.acidic

d.acidic

Step by step solution

01

Given Information

pH is a scale used to specify the acidity or basicity of a fluid solution. Acidic solutions are estimated to have lower pH values than basic or alkaline solutions.

$a. [H_{3} O^{+}] = 1.0 脳 10^{鈭� 11} M b . [H_{3} O^{+}] = 5.0 脳 10^{鈭� 2} M c . [{OH}^{鈭�}] = 3.5 脳 10^{鈭� 4} M d . [{OH}^{鈭�}] = 0.005 M$

02

Explanation

A solution is acidic if its pH is less than $7$ . A solution is basic if its pH is greater than $7$ . A solution is neutral if its pH is equal to $7$ .

Hence, the solutions are -

a. $[H_{3} O^{+}] = 1.0 脳 10^{鈭� 11} M$ is Neutral

b. $[H_{3} O^{+}] = 5.0 脳 10^{鈭� 2} M$ is acidic

c. $[{OH}^{鈭�}] = 3.5 脳 10^{鈭� 4} M$ is acidic

d. $[{OH}^{鈭�}] = 0.005 M$ is acidic

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Most popular questions from this chapter

Consider the buffer system of hydrofluoric acid, HF, and its salt, NaF .

$HF (a q) + H_{2} O (l) 鈬� H_{3} O^{+} (a q) + F^{-} (a q)$

a. The purpose of this buffer system is to:

1. maintain [HF]

2. maintain $[F^{-}]$

3. maintain $pH$

b. The salt of the weak acid is needed to:

1. provide the conjugate base

2. neutralize added $H_{3} O^{+}$

3. provide the conjugate acid

c. If ${OH}^{-}$ is added, it is neutralized by:

1. the salt

2. $H_{2} O$

3. $H_{3} O^{+}$

d. When $H_{3} O^{+}$ is added, the equilibrium shifts in the direction of the:

1. reactants

2. products

3. does not change

At rest, the $[H_{3} O^{+}]$ of the stomach fluid is $2.0 脳 10^{- 4} M$ . What is the $pH$ of the stomach fluid?

Use Le Ch芒telier's principle to predict if each of the following changes causes the system to shift in the direction of products or reactants:

$H_{2} S (a q) + H_{2} O (l) 鈬� H_{3} O^{+} (a q) + {HS}^{鈭�} (a q)$

a. adding more $H_{2} S (a q)$

b. removing some ${HS}^{鈭�} (a q)$

c. adding more $H_{3} O^{+} (a q)$

d. removing some $H_{2} S (a q)$

Why does a neutral solution have a pH of $7.0$ ?

Using Table 103, identify the stronger acid in each of the following pairs:

a. ${NH}_{4}^{+}$ or $H_{3} O^{+}$

b. $H_{2} {SO}_{4}$ or $HCN$

c. $H_{2} O$ or $H_{2} {CO}_{3}$

See all solutions

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