10. Reactions in Aqueous Solutions I

Question 1 of 54

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For instance, your stomach “digestive juice” contains approximately 0.10 mole of ❌ per liter.
Human blood and the aqueous components of most cells are slightly ❌.
The liquid in your car battery is approximately 40% ❌ by mass.
Baking soda (NaHCO3) is a salt of ❌.
❌, a base, is used in the manufacture of soaps, paper, and many other chemicals.
“❌” is solid NaOH that contains some aluminum chips.
❌ is used to season food and as a food preservative.
❌ is used to melt ice on highways and in the emergency treatment of cardiac arrest.
Several ❌ are used as fertilizers.
Many organic acids (❌) and their derivatives occur in nature.
❌ is present in vinegar.
The sting of an ant bite is due to ❌.
❌ are carboxylic acids that also contain basic groups derived from ammonia, and are the building blocks of proteins, which are important materials in all forms of life.
The pleasant odors and flavors of ripe fruit are due in large part to the presence of ❌ that are formed from organic acids in unripe fruit.

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hydrochloric acid (HCl)

basic

sulfuric acid (H2SO4)

carbonic acid (H2CO3)

Sodium hydroxide (NaOH)

Drano

Sodium chloride (NaCl)

Calcium chloride (CaCl2)

ammonium salts

carboxylic acids

Acetic acid

formic acid

Amino acids

esters

Explanation

Question 2 of 54

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are those containing acidic hydrogen atoms.

Explanation

Question 3 of 54

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In 1680, ❌ noted that acids (1) dissolve many substances, (2) change the colors of some natural dyes (indicators), and (3) lose their characteristic properties when mixed with alkalis (bases). By 1814, ❌ concluded that acids neutralize bases and that the two classes of substances should be defined in terms of their reactions with each other.

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Robert Boyle

J. Gay-Lussac

Explanation

Question 4 of 54

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In 1884, (1859–1927) presented his theory of electrolytic dissociation, which resulted in the Arrhenius theory of acid–base reactions.

Explanation

Question 5 of 54

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According to theory an acid is a substance that contains hydrogen and produces H ions in aqueous solution. A base is a substance that contains the OH (hydroxyl) group and produces hydroxide ions in aqueous solution.

Explanation

Question 6 of 54

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is defined as the reaction of H ions with OH ions to form H2O molecules.

Explanation

Question 7 of 54

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The is the species that gives aqueous solutions of acids their characteristic acidic properties.

Explanation

Question 8 of 54

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According to theory, an acid is defined as a proton donor (H ion), and a base is defined as a proton acceptor.

Explanation

Question 9 of 54

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An is the transfer of a proton from an acid to a base. The complete ionization of hydrogen chloride, HCl, a strong acid, in water is an example of this reaction in which water acts as a base or proton acceptor.

Explanation

Question 10 of 54

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The indicator is yellow in acidic solution and blue in basic solution.

Explanation

Question 11 of 54

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Hydrogen fluoride (HF) is a ❌ acid.

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weak

strong

Explanation

Question 12 of 54

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We can describe Brønsted–Lowry acid–base reactions in terms of pairs. These are two species that differ by a proton.

Explanation

Question 13 of 54

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The ( stronger, weaker ) the acid, the ( weaker, stronger ) is its conjugate base; the ( weaker, stronger ) the acid, the ( stronger, weaker ) is its conjugate base.

Note: “Strong” and “weak,” like many adjectives, are used here in a relative sense. “Stronger” and “weaker,” are simply comparative terms that we use to compare the basicity (or acidity) of two (or more) ions or molecules.

Explanation

Question 14 of 54

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Ammonia acts as a ( weak, strong ) Brønsted–Lowry base, and water acts as an acid in the ionization of aqueous ammonia.

Note: Be careful to avoid confusing solubility in water and extent of ionization. They are not necessarily related. Ammonia is very soluble in water (≈15 mol/L at 25˚ C). In a 0.10 M solution, NH3 is only
1.3% ionized to form NH4 ions and 98.7% nonionized.

Explanation

Question 15 of 54

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Water can act either as an acid or as a base, depending on the other species present.

Select one of the following:

True
False

Explanation

Question 16 of 54

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The ability of a substance to react as either an acid or a base is known as .

Explanation

Question 17 of 54

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B-H, C-H, and N-H bonds in neutral molecules are usually too strong to ionize to produce H ions.

Select one of the following:

True
False

Explanation

Question 18 of 54

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This of water is an acid–base reaction according to the Brønsted–Lowry theory. One H2O molecule (the acid) donates a proton to another H2O molecule (the base). The H2O molecule that donates a proton becomes an OH- ion, the conjugate base of water. The H2O molecule that accepts a proton becomes a hydronium ion.

Explanation

Question 19 of 54

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Water is said to be ; that is, H2O molecules can both donate and accept protons.

Explanation

Question 20 of 54

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Whether a particular substance behaves as an acid or as a base is independent of
its environment.

Select one of the following:

True
False

Explanation

Question 21 of 54

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is a more general term that describes the ability of a substance to react either as an acid or as a base.

Explanation

Question 22 of 54

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Several insoluble are amphoteric; that is, they react with acids to form salts and water, but they also dissolve in and react with excess strong bases.

Explanation

Question 23 of 54

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Only a few hydroxides containing small, highly charged metal ions are insoluble in water.

Select one of the following:

True
False

Explanation

Question 24 of 54

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Generally, elements of ( intermediate, high, low ) electronegativity form amphoteric hydroxides. Those of ( high, intermediate, low ) and ( low, intermediate, high ) electronegativity form acidic and basic “hydroxides,” respectively.

Explanation

Question 25 of 54

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The order of bond strengths for the hydrogen halides is

(strongest bonds) ❌ >> ❌ > ❌ > ❌ (weakest bonds)

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HF

HCl

HBr

HI

Explanation

Question 26 of 54

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A weak acid may be very reactive. For example, dissolves sand and glass.

Explanation

Question 27 of 54

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The is the strongest acid that can exist in aqueous solution. All acids stronger than
it will react completely with water to produce H3O+ (aq) and their conjugate bases.

Explanation

Question 28 of 54

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The is the strongest base that can exist in aqueous solution. Bases stronger
than it will react completely with H2O to produce OH- and their conjugate acids.

Explanation

Question 29 of 54

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is the only common polyprotic acid that is also a strong acid.

Explanation

Question 30 of 54

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The first step in the ionization of a polyprotic acid always occurs to a ( greater, lesser ) extent than the second step because it is easier to remove a proton from a neutral acid molecule than from a negatively charged anion.

Explanation

Question 31 of 54

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Acid strengths of most ternary acids containing the same central element ( increase, decrease ) with increasing oxidation state of the central element and with increasing numbers of oxygen atoms.

Explanation

Question 32 of 54

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For most ternary acids containing different elements from the same periodic table group,in the same oxidation state, acid strengths ( increase, decrease ) with increasing electronegativity of the central element.

Explanation

Question 33 of 54

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Most are ionic compounds that contain a cation other than H+ and an anion other than OH- or O2-.

Explanation

Question 34 of 54

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reactions involve the reaction of an acid with a base to form a salt that contains the cation characteristic of the base and the anion characteristic of the acid. Water is also usually formed.

Explanation

Question 35 of 54

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are salts that contain no ionizable H atoms or OH groups.

Explanation

Question 36 of 54

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is very handy for neutralizing chemical spills of acids or bases due to its ability to react with and neutralize both strong acids and strong bases. Containers of this substance are kept in many chemistry labs for this purpose.

Explanation

Question 37 of 54

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If less than a stoichiometric amount of a base reacts with a polyprotic acid, the resulting salt is classified as an , because it can neutralize additional base.

Explanation

Question 38 of 54

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are bases that contain more than one OH per formula unit.

Explanation

Question 39 of 54

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The reaction of a polyhydroxy base with less than a stoichiometric amount of an acid forms a , that is, a salt that contains unreacted OH groups.

Explanation

Question 40 of 54

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Aqueous solutions of basic salts are not necessarily basic, but they can neutralize acids.

Select one of the following:

True
False

Explanation

Question 41 of 54

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A few basic salts are rather insoluble in water.

Select one of the following:

True
False

Explanation

Question 42 of 54

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According to theory, a/an acid is any species that can accept a share in an electron pair. A/An base is any species that can donate or share one or more lone pairs of electrons.

Explanation

Question 43 of 54

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In Lewis theory, theoretically, any species that contains a lone pair of electrons could act as a/an ( base, acid ).

Explanation

Question 44 of 54

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( Arrhenius acids, Brønsted–Lowry ) and bases are also ( Brønsted–Lowry, Arrhenius acids ) acids and bases; the reverse is not true.

( Brønsted–Lowry, Lewis ) acids and bases are also ( Lewis, Brønsted–Lowry ) acids and bases; the reverse is not true.

Explanation

Question 45 of 54

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The reaction of concentrated sulfuric acid with solid ❌ produces gaseous hydrogen fluoride, and with solid ❌ produces gaseous hydrogen fluoride.

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sodium fluoride

sodium chloride

Explanation

Question 46 of 54

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Because concentrated sulfuric acid can act as an agent, it cannot be used to prepare hydrogen bromide or hydrogen iodide; instead, the free halogens are produced.

Explanation

Question 47 of 54

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Some high oxidation state transition metal oxides are ❌ oxides; that is, they dissolve in water to give solutions of ternary ❌.

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acidic

basic

acids

bases

Explanation

Question 48 of 54

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A nonmetal oxide that reacts with water to form an acid.

Explanation

Question 49 of 54

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A metal oxide that reacts with water to form a base.

Explanation

Question 50 of 54

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In aqueous solution, the process in which a solid ionic compound separates into its ions.

Explanation

Question 51 of 54

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A substance whose aqueous solutions conduct electricity.

Explanation

Question 52 of 54

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A chemical equation in which all compounds are represented by complete formulas.

Explanation

Question 53 of 54

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The effect by which all acids stronger than the acid that is characteristic of the solvent react with the solvent to produce that acid; a similar statement applies to bases. The strongest acid (base) that can exist in a given solvent is the acid (base) characteristic of that solvent.

Explanation

Question 54 of 54

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A proton donor. ❌
A proton acceptor. ❌
A substance that produces OH- (aq) ions in aqueous solution. Strong bases are soluble in water and are completely dissociated. Weak bases ionize only slightly. ❌
A substance that produces H+ (aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution; weak acids ionize only slightly. ❌
Any species that can accept a share in an electron pair to form a coordinate covalent bond. ❌
Any species that can make available a share in an electron pair to form a coordinate covalent bond. ❌

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Brønsted–Lowry acid

Brønsted–Lowry base

Arrhenius base

Arrhenius acid

Lewis acid

Lewis base

	Created by Dodong Aleta over 8 years ago

Reactions in Aqueous Solutions

10. Reactions in Aqueous Solutions I

10. Reactions in Aqueous Solutions I

Question 1 of 54

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Explanation

Question 2 of 54

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are those containing acidic hydrogen atoms.

Explanation

Question 3 of 54

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Explanation

Question 4 of 54

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In 1884, (1859–1927) presented his theory of electrolytic dissociation, which resulted in the Arrhenius theory of acid–base reactions.

Explanation

Question 5 of 54

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According to theory an acid is a substance that contains hydrogen and produces H ions in aqueous solution. A base is a substance that contains the OH (hydroxyl) group and produces hydroxide ions in aqueous solution.

Explanation

Question 6 of 54

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is defined as the reaction of H ions with OH ions to form H2O molecules.

Explanation

Question 7 of 54

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The is the species that gives aqueous solutions of acids their characteristic acidic properties.

Explanation

Question 8 of 54

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According to theory, an acid is defined as a proton donor (H ion), and a base is defined as a proton acceptor.

Explanation

Question 9 of 54

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An is the transfer of a proton from an acid to a base. The complete ionization of hydrogen chloride, HCl, a strong acid, in water is an example of this reaction in which water acts as a base or proton acceptor.

Explanation

Question 10 of 54

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The indicator is yellow in acidic solution and blue in basic solution.

Explanation

Question 11 of 54

Hydrogen fluoride (HF) is a ❌ acid.

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Explanation

Question 12 of 54

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We can describe Brønsted–Lowry acid–base reactions in terms of pairs. These are two species that differ by a proton.

Explanation

Question 13 of 54

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Explanation

Question 14 of 54

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Explanation

Question 15 of 54

Water can act either as an acid or as a base, depending on the other species present.

Select one of the following:

Explanation

Question 16 of 54

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The ability of a substance to react as either an acid or a base is known as .

Explanation

Question 17 of 54

B-H, C-H, and N-H bonds in neutral molecules are usually too strong to ionize to produce H ions.

Select one of the following:

Explanation

Question 18 of 54

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Explanation

Question 19 of 54

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Water is said to be ; that is, H2O molecules can both donate and accept protons.

Explanation

Question 20 of 54

Whether a particular substance behaves as an acid or as a base is independent of its environment.

Select one of the following:

Explanation

Question 21 of 54

Fill the blank space to complete the text.

Whether a particular substance behaves as an acid or as a base is independent of
its environment.

The order of bond strengths for the hydrogen halides is

(strongest bonds) ❌ >> ❌ > ❌ > ❌ (weakest bonds)

The is the strongest acid that can exist in aqueous solution. All acids stronger than
it will react completely with water to produce H3O+ (aq) and their conjugate bases.

The is the strongest base that can exist in aqueous solution. Bases stronger
than it will react completely with H2O to produce OH- and their conjugate acids.

The first step in the ionization of a polyprotic acid always occurs to a ( greater, lesser ) extent than the second step because it is easier to remove a proton from a neutral acid molecule than from a negatively charged anion.

Acid strengths of most ternary acids containing the same central element ( increase, decrease ) with increasing oxidation state of the central element and with increasing numbers of oxygen atoms.

For most ternary acids containing different elements from the same periodic table group,in the same oxidation state, acid strengths ( increase, decrease ) with increasing electronegativity of the central element.