22209455
Descrição
Quiz por Daniel Borg, atualizado more than 1 year ago
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Criado por Daniel Borg
mais de 4 anos atrás
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Questão 1
Questão
Which of the following options best describes the properties of acids?
Responda
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Taste Bitter, pH above 7, Irritant, Aqueous
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Taste Sour, pH above 7, release H+ ions in solution
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Taste Sour, pH lower than 7, Explosive, Aqueous
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Taste Sour, pH lower than 7, Corrosive, Aqueous
Questão 2
Questão
Which of the acids below are strong mineral acids? (multiple answers are correct)
Responda
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Hydrochloric acid - HCl
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Nitrous Acid - HNO2
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Sulfurous acid - H2SO3
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Sulfuric acid - H2SO4
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Nitric Acid - HNO3
Questão 3
Questão
When acids dissolve in water, they a"split-up" to release H+ ions. Which other terms can be used instead of the term "split-up"?
Responda
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Dissociate
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Disintegrate
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Disperse
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Ionise
Questão 4
Questão
Which ionisation equation best describes how CH3COOH (ethanoic acid) dissociates in solution?
Responda
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CH3COOH --> 2H+ + CH2OO-
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CH3COOH --> CH3COO- + H+
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CH3COOH --> 3H+ + CHCOO-
Questão 5
Questão
A strong acid is an acid that:
Responda
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has a lot of water added to it
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dissociates (splits up) to release a lot of H+ ions
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dissociates (splits up) to release a little H+ ions
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has little water added to it
Questão 6
Questão
Basicity refers to the number of H+ ions released by an acid in solution. What do understand by the word monobasic acid?
Responda
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releases two H+ ions in solution (per molecule)
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releases one H+ ion in solution (per molecule)
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releases three H+ ions in solution (per molecule)
Questão 7
Questão
What happens to blue litmus paper when it is dipped in a solution of HCl in methylbenzene?
Responda
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It turns red because the HCl ionises releasing H+ ions. This makes the solution acidic.
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It remains blue because HCl does not ionise. It does not release H+ ions. The solution remains neutral.
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It turns white because HCl in methylbenzene is a type of bleach.
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The litmus paper dissolves completely because HCl in methylbenzene is a very strong acid.
Questão 8
Questão
Fill in the equations below with the appropriate symbols:
HCl → [blank_start]H+[blank_end] + Cl‾
H₂SO₄ → [blank_start]2H+[blank_end] + [blank_start]SO₄²‾[blank_end]
[blank_start]H₂CO₃[blank_end] → 2H+ + CO₃²‾
HNO₃ → H+ + [blank_start]NO₃‾[blank_end]
Responda
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H++
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H-
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H+
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H
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SO₃²‾
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SO₄²‾
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SO₃
-
SO₄
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2H+
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OH-
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2H‾
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2H
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NO₂‾
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NO₃²‾
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NO₃+
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NO₃‾
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HCO₃
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H₂CO₃
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H₂CO₂
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H₃CO₃
Questão 9
Questão
Which of the following groups of items are ALL acidic?
Responda
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Coca cola, Toothpaste, Stomach acid, Baking Soda
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Coca cola, Lemon Juice, Stomach acid, Vinegar
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Lemon Juice, Stomach acid, Vinegar, Water
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Coca cola, Bleach, Toothpaste, Lemon Juice
Questão 10
Questão
The term "Concentrated" acid is the same as the term "Strong Acid"
Responda
- True
- False
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