Acids and Bases Grade 11 Worksheet with Answers & Notes

Theories of acids and bases

Subtopic

Theories of acids and bases under Acids and Bases for Grade 11 IB.

Preview questions (no answers)

1.
$NH_3 + H_2O \rightleftharpoons NH_4^+ + OH^-$
A. $NH_3$
B. $NH_3$
C. $H_2O$
D. $H_2O$
2.
$If a substance acts as a Brønsted-Lowry acid, it must contain at least one:$
A. $Oxygen atom$
B. $Hydrogen atom$
C. $Lone pair of electrons$
D. $Metal atom$
3.
$What is the formula of the hydronium ion?$
A. $H_3O^+$
B. $OH^-$
C. $H_2O$
D. $H_4O^{2+}$
4.
$Which of the following is a Lewis acid but NOT a Brønsted-Lowry acid?$
A. $HCl$
B. $H_2SO_4$
C. $CH_3COOH$
D. $BF_3$
5.
$HS^-$
A. $HS^-$
B. $HS^-$
C. $HS^-$
D. $HS^-$
6.
$PCl_3$
A. $PCl_3$
B. $BBr_3$
C. $PCl_3$
D. $BBr_3$
7.
$SnCl_4 + 2Cl^- \rightarrow [SnCl_6]^{2-}$
A. $SnCl_4$
B. $Cl^-$
C. $[SnCl_6]^{2-}$
D. $None of the above$
8.
$HSO_4^-$
A. $H_2SO_4$
B. $SO_4^{2-}$
C. $It is a strong Lewis acid because of the sulfur atom.$
D. $It is not amphiprotic because it is the anion of a strong acid.$
9.
$BrF_3 + F^- \to [BrF_4]^-$
A. $BrF_3$
B. $F^-$
C. $[BrF_4]^-$
D. $This is not an acid-base reaction.$
10.
$CO_2 + H_2O \rightleftharpoons H_2CO_3$
A. $As a Lewis base donating an electron pair to the carbon atom.$
B. $As a Lewis acid accepting an electron pair from the carbon atom.$
C. $CO_2$
D. $As a spectator molecule.$

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Properties of acids and bases

Subtopic

Properties of acids and bases under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
$Which gas is evolved when a hydrogencarbonate reacts with an acid?$
A. $Oxygen$
B. $Hydrogen$
C. $Carbon dioxide$
D. $Nitrogen$
2.
$Which of the following will have the highest electrical conductivity?$
A. $0.1\text{ mol dm}^{-3}$
B. $0.1\text{ mol dm}^{-3}$
C. $0.1\text{ mol dm}^{-3}$
D. $Pure distilled water$
3.
$When ethanoic acid reacts with ammonia, what is the name of the salt produced?$
A. $Ammonium ethanoate$
B. $Sodium ethanoate$
C. $Ammonium nitrate$
D. $Methyl ethanoate$
4.
$pH$
A. $5$
B. $7$
C. $9$
D. $14$
5.
$pH$
A. $3$
B. $3$
C. $1000$
D. $1000$
6.
$Which substance is used to neutralize acidic soil in agriculture?$
A. $Ca(OH)_2$
B. $NH_4Cl$
C. $Na_2SO_4$
D. $CH_3COOH$
7.
$Which statement is true for a weak acid solution compared to a strong acid solution of the same molar concentration?$
A. $[H^+]$
B. $pH$
C. $The weak acid solution is a poorer conductor of electricity.$
D. $The weak acid solution will neutralize more base.$
8.
$HPO_4^{2-}$
A. $PO_4^{3-}$
B. $H_2PO_4^-$
C. $H_3PO_4$
D. $OH^-$
9.
$K_a$
A. $Temperature$
B. $The nature of the solvent$
C. $The concentration of the acid$
D. $The molecular structure of the acid$
10.
$pOH$
A. $2.00$
B. $2.30$
C. $11.70$
D. $1.70$

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The pH scale

Subtopic

The pH scale under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
$How many times more acidic is a solution with pH 2 than a solution with pH 4?$
A. $2 times$
B. $10 times$
C. $20 times$
D. $100 times$
2.
$Which of the following pH values represents a neutral solution?$
A. $pH 0$
B. $pH 1$
C. $pH 7$
D. $pH 14$
3.
$[H^+] = 1.0 \times 10^{-10}\ mol\,dm^{-3}$
A. $1.0 \times 10^{-4}\ mol\,dm^{-3}$
B. $1.0 \times 10^{-7}\ mol\,dm^{-3}$
C. $1.0 \times 10^{-10}\ mol\,dm^{-3}$
D. $1.0 \times 10^{-14}\ mol\,dm^{-3}$
4.
$0.1\ mol\,dm^{-3}$
A. $1$
B. $7$
C. $13$
D. $14$
5.
$[H^+] = 1.0 \times 10^{-13}$
A. $1.0$
B. $13.0$
C. $7.0$
D. $14.0$
6.
$HCl$
A. $0.010$
B. $0.020$
C. $0.050$
D. $0.170$
7.
$Comparing solution A (pH 2) and solution B (pH 5), which statement is correct?$
A. $3$
B. $1000$
C. $1000$
D. $3$
8.
$0.10$
A. $1.00$
B. $1.46$
C. $2.00$
D. $0.92$
9.
$0.001$
A. $3.00$
B. $3.14$
C. $2.86$
D. $7.00$
10.
$pH = 7$
A. $0.1$
B. $0.1$
C. $0.1$
D. $0.1$

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Strong and weak acids and bases

Subtopic

Strong and weak acids and bases under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
$Identify the weak acid among the following options.$
A. $HF$
B. $HBr$
C. $HI$
D. $HClO_{4}$
2.
$NaOH$
A. $Partial dissociation in water$
B. $High electrical conductivity$
C. $Slippery feel to the touch$
D. $Turns universal indicator purple$
3.
$Which of the following gases, when dissolved in water, forms a weak acid?$
A. $CO_{2}$
B. $HCl$
C. $HBr$
D. $SO_{3}$
4.
$0.1\,mol\,dm^{-3}$
A. $1$
B. $3$
C. $5$
D. $7$
5.
$H_{2}PO_{4}^{-} + OH^{-} \rightleftharpoons HPO_{4}^{2-} + H_{2}O$
A. $H_{2}PO_{4}^{-}$
B. $HPO_{4}^{2-}$
C. $H_{2}PO_{4}^{-}$
D. $OH^{-}$
6.
$0.10\,mol\,dm^{-3}$
A. $NaCl(aq)$
B. $HCl(aq)$
C. $CH_{3}COOH(aq)$
D. $H_{2}SO_{4}(aq)$
7.
$Which substance is a weak base?$
A. $KOH$
B. $Ba(OH)_{2}$
C. $CH_{3}NH_{2}$
D. $NaOH$
8.
$0.10\,mol\,dm^{-3}$
A. $Between 4.0 and 5.0$
B. $Exactly 5.0$
C. $Between 5.0 and 6.0$
D. $Exactly 6.0$
9.
$H_{2}O + CH_{3}NH_{2} \rightleftharpoons OH^{-} + CH_{3}NH_{3}^{+}$
A. $H_{2}O$
B. $CH_{3}NH_{2}$
C. $OH^{-}$
D. $H_{2}O$
10.
$50\,cm^{3}$
A. $0.70$
B. $1.00$
C. $7.00$
D. $13.30$

Download the worksheet for Acids and Bases - Strong and weak acids and bases to practice offline. It includes additional chapter-level practice questions.

Acid deposition

Subtopic

Acid deposition under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
$Which natural event is a significant non-anthropogenic source of sulfur dioxide gas?$
A. $Plant respiration$
B. $Volcanic eruptions$
C. $Glacial melting$
D. $Animal migration$
2.
$What role do solid particulates in the atmosphere play in the formation of acid rain?$
A. $They neutralize the acids$
B. $They provide a surface for reactions and act as catalysts$
C. $They prevent the sun from reaching the ground$
D. $They absorb all the moisture in the air$
3.
$Which alkaline substance is often used in wet scrubbers to neutralize sulfur dioxide gas?$
A. $Hydrochloric acid$
B. $Calcium carbonate$
C. $Sodium sulfate$
D. $Nitric acid$
4.
$Which of the following is a primary nitrogen-containing pollutant formed during high-temperature combustion in engines?$
A. $NH_3$
B. $NO$
C. $NH_4NO_3$
D. $N_2H_4$
5.
$Atmospheric sulfur dioxide can be oxidized to sulfuric acid through several pathways. The flowchart below represents the oxidation process occurring in the aqueous phase within cloud droplets. Which species is the most likely identity of the oxidant labeled 'X'?$
A. $H_2O_2$
B. $NH_3$
C. $N_2$
D. $CO_2$
6.
$Which characteristic of sulfur dioxide makes it a major contributor to acid rain far from its original source?$
A. $It is extremely reactive and reacts immediately with the ground.$
B. $It is a gas with a relatively long atmospheric lifetime, allowing for long-range transport.$
C. $It is heavier than air and sinks directly into the soil near the factory.$
D. $It only reacts with water at very high altitudes in the stratosphere.$
7.
$Which reaction shows the neutralization of nitric acid during the liming of a lake?$
A. $CaO + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2O$
B. $Ca + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2$
C. $CO_2 + HNO_3 \rightarrow HCO_3NO_2$
D. $CaCO_3 + H_2O \rightarrow Ca(OH)_2 + CO_2$
8.
$H_2S$
A. $2H_2S + SO_2 \rightarrow 3S + 2H_2O$
B. $H_2S + O_2 \rightarrow S + H_2O$
C. $2H_2S + 3O_2 \rightarrow 2SO_2 + 2H_2O$
D. $3H_2S + SO_2 \rightarrow 4S + 2H_2O + H_2$
9.
$What is the primary difference in the chemical composition of 'acid rain' resulting from the burning of coal versus the operation of internal combustion engines?$
A. $Coal combustion primarily leads to sulfuric acid, while internal combustion primarily leads to nitric acid.$
B. $Coal combustion leads to nitric acid, while internal combustion leads to sulfuric acid.$
C. $Both lead almost exclusively to sulfuric acid, but coal produces more of it.$
D. $CO_2$
10.
$\cdot OH$
A. $O_3 + h\nu \rightarrow O(^1D) + O_2$
B. $H_2O + h\nu \rightarrow \cdot OH + H\cdot$
C. $NO_2 + H_2O \rightarrow HNO_3 + \cdot OH$
D. $O_2 + H_2 \rightarrow 2\cdot OH$

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Lewis acids and bases (HL)

Subtopic

Lewis acids and bases (HL) under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
1. Lewis acids and bases (HL): practice question 1 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
2.
1. Lewis acids and bases (HL): practice question 2 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
3.
1. Lewis acids and bases (HL): practice question 3 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
4.
1. Lewis acids and bases (HL): practice question 4 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
5.
1. Lewis acids and bases (HL): practice question 5 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
6.
1. Lewis acids and bases (HL): practice question 6 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
7.
1. Lewis acids and bases (HL): practice question 7 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
8.
1. Lewis acids and bases (HL): practice question 8 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
9.
1. Lewis acids and bases (HL): practice question 9 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
10.
1. Lewis acids and bases (HL): practice question 10 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$

Download the worksheet for Acids and Bases - Lewis acids and bases (HL) to practice offline. It includes additional chapter-level practice questions.

Calculations involving acids and bases (HL)

Subtopic

Calculations involving acids and bases (HL) under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
1. Calculations involving acids and bases (HL): practice question 1 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
2.
1. Calculations involving acids and bases (HL): practice question 2 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
3.
1. Calculations involving acids and bases (HL): practice question 3 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
4.
1. Calculations involving acids and bases (HL): practice question 4 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
5.
1. Calculations involving acids and bases (HL): practice question 5 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
6.
1. Calculations involving acids and bases (HL): practice question 6 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
7.
1. Calculations involving acids and bases (HL): practice question 7 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
8.
1. Calculations involving acids and bases (HL): practice question 8 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
9.
1. Calculations involving acids and bases (HL): practice question 9 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
10.
1. Calculations involving acids and bases (HL): practice question 10 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$

Download the worksheet for Acids and Bases - Calculations involving acids and bases (HL) to practice offline. It includes additional chapter-level practice questions.

pH curves (HL)

Subtopic

pH curves (HL) under Acids and Bases for Grade 11 IB.

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Preview questions (no answers)

1.
1. pH curves (HL): practice question 1 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
2.
1. pH curves (HL): practice question 2 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
3.
1. pH curves (HL): practice question 3 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
4.
1. pH curves (HL): practice question 4 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
5.
1. pH curves (HL): practice question 5 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
6.
1. pH curves (HL): practice question 6 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
7.
1. pH curves (HL): practice question 7 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
8.
1. pH curves (HL): practice question 8 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
9.
1. pH curves (HL): practice question 9 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$
10.
1. pH curves (HL): practice question 10 for Acids and Bases?
A. $Option A$
B. $Option B$
C. $Option C$
D. $Option D$

Download the worksheet for Acids and Bases - pH curves (HL) to practice offline. It includes additional chapter-level practice questions.

Acids and Bases

Theories of acids and bases

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Properties of acids and bases

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The pH scale

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Strong and weak acids and bases

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Acid deposition

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Lewis acids and bases (HL)

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Calculations involving acids and bases (HL)

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pH curves (HL)

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Preview questions (no answers)

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