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Foundations of College Chemistry

Morris Hein, Susan Arena

Chapter 15

Acids, Bases, and Salts - all with Video Answers

Educators

Chapter Questions

02:33

Problem 1

Identify the conjugate acid-base pairs in the following equations:
(a) $\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2+\mathrm{H}_2 \mathrm{SO}_4 \rightleftharpoons \mathrm{H}_2 \mathrm{C}_2 \mathrm{H}_3 \mathrm{O}_2^{+}+\mathrm{HSO}_4^{-}$
(b) The two-step ionization of sulfuric acid,
$$
\begin{aligned}
& \mathrm{H}_2 \mathrm{SO}_4+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{HSO}_4^{-} \\
& \mathrm{HSO}_4^{-}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{SO}_4^{2-}
\end{aligned}
$$
(c) $\mathrm{HClO}_4+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{ClO}_4^{-}$
(d) $\mathrm{CH}_3 \mathrm{O}^{-}+\mathrm{H}_3 \mathrm{O}^{+} \longrightarrow \mathrm{CH}_3 \mathrm{OH}+\mathrm{H}_2 \mathrm{O}$

Shahina -
Shahina -
Numerade Educator
01:59

Problem 2

Identify the conjugate acid-base pairs in the following equations:
(a) $\mathrm{HCl}+\mathrm{NH}_3 \longrightarrow \mathrm{NH}_4^{+}+\mathrm{Cl}^{-}$
(b) $\mathrm{HCO}_3^{-}+\mathrm{OH}^{-} \rightleftharpoons \mathrm{CO}_3^{2-}+\mathrm{H}_2 \mathrm{O}$
(c) $\mathrm{HCO}_3^{-}+\mathrm{H}_3 \mathrm{O}^{+} \rightleftharpoons \mathrm{H}_2 \mathrm{CO}_3+\mathrm{H}_2 \mathrm{O}$
(d) $\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{C}_2 \mathrm{H}_3 \mathrm{O}_2^{-}$

Lottie Adams
Lottie Adams
Numerade Educator
02:51

Problem 3

Complete and balance these equations:
(a) $\mathrm{Zn}(s)+\mathrm{HCl}(a q) \longrightarrow$
(b) $\mathrm{Al}(\mathrm{OH})_3(s)+\mathrm{H}_2 \mathrm{SO}_4(a q) \longrightarrow$
(c) $\mathrm{Na}_2 \mathrm{CO}_3(a q)+\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2(a q) \longrightarrow$
(d) $\mathrm{MgO}(\mathrm{s})+\mathrm{HI}(a q) \longrightarrow \longrightarrow$
(e) $\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2(s)+\mathrm{HBr}(a q) \longrightarrow$
(f) $\mathrm{KOH}(a q)+\mathrm{H}_3 \mathrm{PO}_4(a q) $\longrightarrow

JM
Jana Murdock
Numerade Educator
00:59

Problem 4

Complete and balance these equations:
(a) $\mathrm{Fe}_2 \mathrm{O}_3(s)+\mathrm{HBr}(a q) \longrightarrow$
(b) $\mathrm{Al}(s)+\mathrm{H}_2 \mathrm{SO}_4(\mathrm{aq}) \longrightarrow$
(c) $\mathrm{NaOH}(a q)+\mathrm{H}_2 \mathrm{CO}_3(\mathrm{aq}) \longrightarrow$
(d) $\mathrm{Ba}(\mathrm{OH})_2(\mathrm{~s})+\mathrm{HClO}_4(\mathrm{aq}) \longrightarrow$
(e) $\mathrm{Mg}(s)+\mathrm{HClO}_4(a q) \longrightarrow$
(f) $\mathrm{K}_2 \mathrm{O}($ s) $+\mathrm{HI}(a q) \longrightarrow$

Aadit Sharma
Aadit Sharma
Numerade Educator
01:16

Problem 5

For each of the formula equations in Question 3, write total and net ionic equations.

Ronald Prasad
Ronald Prasad
Numerade Educator
01:16

Problem 6

For each of the formula equations in Question 4, write total and net ionic equations.

Ronald Prasad
Ronald Prasad
Numerade Educator
01:28

Problem 7

Which of these compounds are electrolytes? Consider each substance to be mixed with water.
(a) HCl
(b) $\mathrm{CO}_2$
(c) $\mathrm{CaCl}_2$
(d) $\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}$ (sugar)
(e) $\mathrm{C}_3 \mathrm{H}_7 \mathrm{OH}$ (rubbing alcohol)
(f) $\mathrm{CCl}_4$ (insoluble)

Crystal Wang
Crystal Wang
Numerade Educator
02:16

Problem 8

Which of these compounds are electrolytes? Consider each substance to be mixed with water.
(a) $\mathrm{NaHCO}_3$ (baking soda)
(b) $\mathrm{N}_2$ (insoluble gas)
(c) $\mathrm{AgNO}_3$
(d) HCOOH (formic acid)
(e) RbOH
(f) $\mathrm{K}_2 \mathrm{CrO}_4$

Christopher Nilsen
Christopher Nilsen
Numerade Educator
03:37

Problem 9

Calculate the molarity of the ions present in these salt solutions. Assume each salt to be $100 \%$ dissociated:
(a) 0.015 M NaCl
(b) $4.25 \mathrm{M} \mathrm{NaKSO}_4$
(c) $0.20 \mathrm{M} \mathrm{CaCl}_2$
(d) 22.0 g KI in 500 . mL of solution

Eileen Sullivan
Eileen Sullivan
Numerade Educator
10:35

Problem 10

Calculate the molarity of the ions present in these salt solutions. Assume each salt to be $100 \%$ dissociated:
(a) $0.75 \mathrm{M} \mathrm{ZnBr}_2$
(b) $1.65 \mathrm{M} \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$
(c) $900 . \mathrm{g}\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4$ in 20.0 L of solution
(d) $0.0120 \mathrm{~g} \mathrm{Mg}\left(\mathrm{ClO}_3\right)_2$ in 1.00 mL of solution

Isabella Huang
Isabella Huang
Numerade Educator
00:49

Problem 11

In Exercise 9, how many grams of each ion would be present in $100 . \mathrm{mL}$ of each solution?

David Collins
David Collins
Numerade Educator
00:49

Problem 12

In Exercise 10, how many grams of each ion would be present in $100 . \mathrm{mL}$ of each solution?

David Collins
David Collins
Numerade Educator
01:30

Problem 13

Calculate the $\left[\mathrm{H}^{+}\right]$for:
(a) a solution with a $\mathrm{pH}=8.5$
(b) pure water
(c) a solution with a $\mathrm{pH}=2.5$

David Collins
David Collins
Numerade Educator
01:13

Problem 14

Calculate the $\left[\mathrm{H}^{+}\right]$for:
(a) a solution with a $\mathrm{pH}=2.4$
(b) a solution with a $\mathrm{pH}=10.0$
(c) tap water with a $\mathrm{pH}=6.4$

David Collins
David Collins
Numerade Educator
20:13

Problem 15

What is the molar concentration of all ions present in a solution prepared by mixing the following?
(Neglect the concentration of $\mathrm{H}^{+}$and $\mathrm{OH}^{-}$from water and assume that volumes of solutions are additive.)
(a) 30.0 mL of 1.0 M NaCl and 40.0 mL of 1.0 M NaCl
(b) 30.0 mL of 1.0 M HCl and 30.0 mL of 1.0 M NaOH
(c) 100.0 mL of 0.40 M KOH and 100.0 mL of 0.80 M HCl

Md Mohibullah
Md Mohibullah
Auburn University Main Campus
06:20

Problem 16

What is the molar concentration of all ions present in a solution prepared by mixing the following?
(Neglect the concentration of $\mathrm{H}^{+}$and $\mathrm{OH}^{-}$from water and assume volumes of solutions are additive.)
(a) 100.0 mL of 2.0 M KCl and 100.0 mL of 1.0 M $\mathrm{CaCl}_2$
(b) 35.0 mL of $0.20 \mathrm{MBa}(\mathrm{OH})_2$ and 35.0 mL of $0.20 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$
(c) 1.00 L of $1.0 \mathrm{M} \mathrm{AgNO}_3$ and $500 . \mathrm{mL}$ of 2.0 M NaCl

Eileen Sullivan
Eileen Sullivan
Numerade Educator
04:14

Problem 17

Given the data for the following separate titrations, calculate the molarity of the HCl :
$$
\begin{array}{lcccc}
\hline & \mathbf{m L ~ H C l} & \begin{array}{c}
\text { Molarity } \\
\text { HCl }
\end{array} & \mathbf{m L ~ N a O H} & \begin{array}{c}
\text { Molarity } \\
\text { NaOH }
\end{array} \\
\hline \text { (a) } & 40.13 & M & 37.70 & 0.728 \\
\text { (b) } & 19.00 & M & 33.66 & 0.306 \\
\text { (c) } & 27.25 & M & 18.00 & 0.555
\end{array}
$$

David Collins
David Collins
Numerade Educator
04:50

Problem 18

Given the data for the following separate titrations, calculate the molarity of the NaOH :
$$
\begin{array}{lcccc}
& \text { mL HCl } & \begin{array}{c}
\text { Molarity } \\
\text { HCl }
\end{array} & \mathbf{m L ~ N a O H} & \begin{array}{c}
\text { Molarity } \\
\text { NaOH }
\end{array} \\
\hline \text { (a) } & 37.19 & 0.126 & 31.91 & M \\
\text { (b) } & 48.04 & 0.482 & 24.02 & M \\
\text { (c) } & 13.13 & 1.425 & 39.39 & M \\
\hline
\end{array}
$$

David Collins
David Collins
Numerade Educator
05:30

Problem 19

Rewrite the following unbalanced equations, changing them into balanced net ionic equations (assume that all reactions are in water solution):
(a) $\mathrm{K}_2 \mathrm{SO}_4(a q)+\mathrm{Ba}\left(\mathrm{NO}_3\right)_2(a q)$ $\qquad$
$$
\mathrm{KNO}_3(a q)+\mathrm{BaSO}_4(s)
$$
(b) $\mathrm{CaCO}_3(s)+\mathrm{HCl}(a q) \longrightarrow$
$$
\mathrm{CaCl}_2(a q)+\mathrm{CO}_2(g)+\mathrm{H}_2 \mathrm{O}(l)
$$
(c) $\mathrm{Mg}(\mathrm{s})+\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2(a q) \longrightarrow \mathrm{Mg}\left(\mathrm{C}_2 \mathrm{H}_3 \mathrm{O}_2\right)_2(a q)+\mathrm{H}_2(\mathrm{~g})$

David Collins
David Collins
Numerade Educator
03:19

Problem 20

Rewrite the following unbalanced equations, changing them into balanced net ionic equations (assume that all reactions are in water solution):
(a) $\mathrm{H}_2 \mathrm{~S}(\mathrm{~g})+\mathrm{CdCl}_2(a q) \longrightarrow \mathrm{CdS}(\mathrm{s})+\mathrm{HCl}(a q)$
(b) $\mathrm{Zn}(s)+\mathrm{H}_2 \mathrm{SO}_4(a q) \longrightarrow \mathrm{ZnSO}_4(a q)+\mathrm{H}_2(\mathrm{~g})$
(c) $\mathrm{AlCl}_3(a q)+\mathrm{Na}_3 \mathrm{PO}_4(a q) \longrightarrow$
$$
\mathrm{AlPO}_4(s)+\mathrm{NaCl}(a q)
$$

Banhishikha Sinha
Banhishikha Sinha
Numerade Educator
01:19

Problem 21

For each of the given pairs, determine which solution is more acidic. All are water solutions. Explain your answer.
(a) 1 M HCl or $1 \mathrm{MH}_2 \mathrm{SO}_4$ ?
(b) 1 M HCl or $1 \mathrm{M} \mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2$ ?

Lottie Adams
Lottie Adams
Numerade Educator
01:19

Problem 22

For each of the given pairs, determine which solution is more acidic. All are water solutions. Explain your answer.
(a) 1 M HCl or 2 M HCl ?
(b) $1 \mathrm{M} \mathrm{HNO}_3$ or $1 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ ?

Lottie Adams
Lottie Adams
Numerade Educator
00:37

Problem 23

What volume (in milliliters) of 0.245 M HCl will neutralize $10.0 \mathrm{~g} \mathrm{Al}(\mathrm{OH})_3$ ? The equation is
$$
3 \mathrm{HCl}(a q)+\mathrm{Al}(\mathrm{OH})_3(s) \longrightarrow \mathrm{AlCl}_3(a q)+3 \mathrm{H}_2 \mathrm{O}(l)
$$

Sisi Gao
Sisi Gao
Numerade Educator
01:17

Problem 24

What volume (in milliliters) of 0.245 M HCl will neutralize 50.0 mL of $0.100 \mathrm{M} \mathrm{Ca}(\mathrm{OH})_2$ ? The equation is
$$
2 \mathrm{HCl}(a q)+\mathrm{Ca}(\mathrm{OH})_2(a q) \longrightarrow \mathrm{CaCl}_2(a q)+2 \mathrm{H}_2 \mathrm{O}(l)
$$

David Collins
David Collins
Numerade Educator
02:34

Problem 25

A $0.200-\mathrm{g}$ sample of impure NaOH requires 18.25 mL of 0.2406 M HCl for neutralization. What is the percent of NaOH in the sample?

Aadit Sharma
Aadit Sharma
Numerade Educator
02:23

Problem 26

A batch of sodium hydroxide was found to contain sodium chloride as an impurity. To determine the amount of impurity, a 1.00-g sample was analyzed and found to require 49.90 mL of 0.466 M HCl for neutralization. What is the percent of NaCl in the sample?

David Collins
David Collins
Numerade Educator
01:08

Problem 27

What volume of $\mathrm{H}_2$ gas, measured at $27^{\circ} \mathrm{C}$ and 700 . torr, can be obtained by reacting 5.00 g of zinc metal with 100. mL of 0.350 M HCl ? The equation is
$$
\mathrm{Zn}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{ZnCl}_2(a q)+\mathrm{H}_2(g)
$$

David Collins
David Collins
Numerade Educator
03:23

Problem 28

What volume of $\mathrm{H}_2$ gas, measured at $27^{\circ} \mathrm{C}$ and 700 . torr, can be obtained by reacting 5.00 g of zinc metal with 200. mL of 0.350 M HCl ? The equation is
$$
\mathrm{Zn}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{ZnCl}_2(a q)+\mathrm{H}_2(g)
$$

Adriano Chikande
Adriano Chikande
Numerade Educator
01:30

Problem 29

Calculate the pH of solutions having these $\mathrm{H}^{+}$ion concentrations:
(a) 0.01 M
(b) 1.0 M
(c) $6.5 \times 10^{-9} \mathrm{M}$

David Collins
David Collins
Numerade Educator
01:30

Problem 30

Calculate the pH of solutions having these $\mathrm{H}^{+}$ion concentrations:
(a) $1 \times 10^{-7} \mathrm{M}$
(b) 0.50 M
(c) 0.00010 M

David Collins
David Collins
Numerade Educator
01:18

Problem 31

Calculate the pH of
(a) orange juice, $3.7 \times 10^{-4} \mathrm{MH}^{+}$
(b) vinegar, $2.8 \times 10^{-3} \mathrm{M} \mathrm{H}^{+}$

David Collins
David Collins
Numerade Educator
01:39

Problem 32

Calculate the pH of
(a) black coffee, $5.0 \times 10^{-5} \mathrm{M} \mathrm{H}^{+}$
(b) limewater, $3.4 \times 10^{-11} \mathrm{MH}^{+}$

Cinsy Krehbiel
Cinsy Krehbiel
Numerade Educator
02:56

Problem 33

Determine whether each of the following is a strong acid, weak acid, strong base, or weak base. Then write an equation describing the process that occurs when the substance is dissolved in water.
(a) $\mathrm{NH}_3$
(b) HCl
(c) KOH
(d) $\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2$

Jacob Light
Jacob Light
Numerade Educator
02:52

Problem 34

Determine whether each of the following is a strong acid, weak acid, strong base, or weak base. Then write an equation describing the process that occurs when the substance is dissolved in water.
(a) $\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4$
(b) $\mathrm{Ba}(\mathrm{OH})_2$
(c) $\mathrm{HClO}_4$
(d) HBr

Karoline García
Karoline García
Numerade Educator
02:15

Problem 35

Determine whether each of the following describes a substance that is acidic, basic, or neutral.
(a) $\left[\mathrm{H}^{+}\right]=1 \times 10^{-4}$
(b) Phenolphthalein turns pink.
(c) $\mathrm{pH}=8$
(d) $\left[\mathrm{H}^{+}\right]=1 \times 10^{-9}$
(e) $\left[\mathrm{OH}^{-}\right]=1 \times 10^{-7}$
(f) Blue litmus paper turns red.

Adriano Chikande
Adriano Chikande
Numerade Educator
05:16

Problem 36

Draw pictures similar to those found in Figure 15.2 to show what happens to the following compounds when each is dissolved in water.
(a) $\mathrm{CaCl}_2$
(b) KF
(c) $\mathrm{AlBr}_3$

Crystal Wang
Crystal Wang
Numerade Educator
02:49

Problem 37

What is the concentration of $\mathrm{Ca}^{2+}$ ions in a solution of $\mathrm{CaI}_2$ having an $\mathrm{I}^{-}$ion concentration of 0.520 M ?

Jennifer Hudspeth
Jennifer Hudspeth
Numerade Educator
05:25

Problem 38

If 29.26 mL of 0.430 MHCl neutralize 20.40 mL of $\mathrm{Ba}(\mathrm{OH})_2$ solution, what is the molarity of the $\mathrm{Ba}(\mathrm{OH})_2$ solution? The reaction is
$$
\mathrm{Ba}(\mathrm{OH})_2(a q)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{BaCl}_2(a q)+2 \mathrm{H}_2 \mathrm{O}(l)
$$

Zafar Haider
Zafar Haider
Numerade Educator
05:05

Problem 39

A 1 m solution of acetic acid, $\mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2$, in water freezes at a lower temperature than a 1 m solution of ethyl alcohol, $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$, in water. Explain.

Dominique Jan Tan
Dominique Jan Tan
Numerade Educator
00:27

Problem 40

At the same cost per pound, which alcohol, $\mathrm{CH}_3 \mathrm{OH}$ or $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$, would be more economical to purchase as an antifreeze for your car? Why?

Shazia Naz
Shazia Naz
Numerade Educator
01:33

Problem 41

How does a hydronium ion differ from a hydrogen ion?

Shahina -
Shahina -
Numerade Educator
01:35

Problem 42

Arrange, in decreasing order of freezing points, 1 m aqueous solutions of $\mathrm{HCl}, \mathrm{HC}_2 \mathrm{H}_3 \mathrm{O}_2, \mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}$ (sucrose), and $\mathrm{CaCl}_2$. (List the one with the highest freezing point first.)

Marissa Turner
Marissa Turner
Numerade Educator
03:56

Problem 43

At $100^{\circ} \mathrm{C}$ the $\mathrm{H}^{+}$concentration in water is about $1 \times 10^{-6} \mathrm{~mol} / \mathrm{L}$, about 10 times that of water at $25^{\circ} \mathrm{C}$. At which of these temperatures is
(a) the pH of water the greater?
(b) the hydrogen ion (hydronium ion) concentration the higher?
(c) the water neutral?

Allison Parrett
Allison Parrett
Numerade Educator
00:40

Problem 44

What is the relative difference in $\mathrm{H}^{+}$concentration in solutions that differ by one pH unit?

Himanshu Garg
Himanshu Garg
Numerade Educator
00:19

Problem 45

What is the mole percent of a 1.00 m aqueous solution?

David Collins
David Collins
Numerade Educator
04:00

Problem 46

A sample of pure sodium carbonate with a mass of 0.452 g was dissolved in water and neutralized with 42.4 mL of hydrochloric acid. Calculate the molarity of the acid:
$$
\begin{aligned}
& \mathrm{Na}_2 \mathrm{CO}_3(a q)+2 \mathrm{HCl}(a q) \longrightarrow \\
&& 2 \mathrm{NaCl}(a q)+\mathrm{CO}_2(g)+\mathrm{H}_2 \mathrm{O}(\mathrm{l}) \\
&
\end{aligned}
$$

Zafar Haider
Zafar Haider
Numerade Educator
01:54

Problem 47

What volume $(\mathrm{mL})$ of 0.1234 MHCl is needed to neutralize $2.00 \mathrm{~g} \mathrm{Ca}(\mathrm{OH})_2$ ?

Ronald Prasad
Ronald Prasad
Numerade Educator
01:07

Problem 48

How many grams of KOH are required to neutralize 50.00 mL of $0.240 \mathrm{M} \mathrm{HNO}_3$ ?

Adriano Chikande
Adriano Chikande
Numerade Educator
01:19

Problem 49

Two drops $(0.1 \mathrm{~mL})$ of 1.0 M HCl are added to water to make 1.0 L of solution. What is the pH of this solution if the HCl is $100 \%$ ionized?

David Collins
David Collins
Numerade Educator
00:39

Problem 50

What volume of concentrated $(18.0 \mathrm{M})$ sulfuric acid must be used to prepare 50.0 L of 5.00 M solution?

Nicole Mabante
Nicole Mabante
Numerade Educator
04:03

Problem 51

If 3.0 g NaOH are added to 500 mL of 0.10 M HCl , will the resulting solution be acidic or basic? Show evidence for your answer.

David Collins
David Collins
Numerade Educator
03:12

Problem 52

If 380 mL of $0.35 \mathrm{MBa}(\mathrm{OH})_2$ are added to $500 . \mathrm{mL}$ of 0.65 M HCl , will the mixture be acidic or basic ? Find the pH of the resulting solution.

Eileen Sullivan
Eileen Sullivan
Numerade Educator
04:50

Problem 53

If 50.00 mL of 0.2000 M HCl are titrated with 0.2000 M NaOH , find the pH of the solution after the following amounts of base have been added:
(a) 0.000 mL
(b) 10.00 mL
(c) 25.00 mL
(d) 49.00 mL
(e) 49.90 mL
(f) 49.99 mL
(g) 50.00 mL

Plot your answers on a graph with pH on the $y$-axis and mL NaOH on the $x$-axis.

David Collins
David Collins
Numerade Educator
03:52

Problem 54

Sulfuric acid reacts with NaOH :
(a) Write a balanced equation for the reaction producing $\mathrm{Na}_2 \mathrm{SO}_4$.
(b) How many milliliters of 0.10 M NaOH are needed to react with $0.0050 \mathrm{~mol} \mathrm{H}_2 \mathrm{SO}_4$ ?
(c) How many grams of $\mathrm{Na}_2 \mathrm{SO}_4$ will also form?

Chareen Guzman
Chareen Guzman
Numerade Educator
01:42

Problem 55

A $10.0-\mathrm{mL}$ sample of $\mathrm{HNO}_3$ was diluted to a volume of 100.00 mL . Then, 25 mL of that diluted solution were needed to neutralize 50.0 mL of 0.60 M KOH . What was the concentration of the original nitric acid?

Dr. Satish Ingale
Dr. Satish Ingale
Numerade Educator
00:37

Problem 56

The pH of a solution of a strong acid was determined to be 3. If water is then added to dilute this solution, would the pH change? Why or why not? Could enough water ever be added to raise the pH of an acid solution above 7 ?

David Collins
David Collins
Numerade Educator
05:04

Problem 57

An HCl solution has a pH of -0.300 . What volume of water must be added to 200 mL of this solution to change the pH to -0.150 ?

Freddie Montague
Freddie Montague
Numerade Educator
04:12

Problem 58

Lactic acid (found in sour milk) has an empirical formula of $\mathrm{HC}_3 \mathrm{H}_5 \mathrm{O}_3$. A 1.0-g sample of lactic acid required 17.0 mL of 0.65 M NaOH to reach the end point of a titration. What is the molecular formula for lactic acid?

Dr. Satish Ingale
Dr. Satish Ingale
Numerade Educator