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WorksheetsReview Questions for Long Test
Total questions: 65
Worksheet time: 1hrs 5mins
According to Arrhenius theory, what do acids yield when they dissociate in water?
Hydroxide ions (OH-)
Hydrogen ions (H+)
Sodium ions (Na+)
Chloride ions (Cl-)
Which of the following is an example of an Arrhenius acid?
Calcium hydroxide (Ca(OH)2)
Hydrochloric acid (HCl)
Potassium hydroxide (KOH)
Sodium hydroxide (NaOH)
What is formed when an Arrhenius acid reacts with an Arrhenius base?
Water and salt
Hydrogen gas and salt
Salt and carbon dioxide
Oxygen gas and water
Which of the following compounds is classified as an Arrhenius base?
Sodium hydroxide (NaOH)
Sulfuric acid (H2SO4)
Nitric acid (HNO3)
Acetic acid (CH3COOH)
What does the term 'ionization' refer to in the context of acids?
Neutralization of acids and bases
Dissociation of salts in water
Formation of ions from polar covalent molecules
Formation of ions from ionic compounds
Which of the following acids is considered a strong acid?
Acetic acid (CH3COOH)
Phosphoric acid (H3PO4)
Hydrochloric acid (HCl)
Citric acid (C6H8O7)
What is the product of the reaction between hydrochloric acid and sodium hydroxide?
Sodium chloride and water
Water and carbon dioxide
Sodium sulfate and water
Hydrogen gas and sodium chloride
Which of the following statements is true regarding Arrhenius acids?
They yield hydroxide ions in water.
They yield hydrogen ions in water.
They cannot be strong acids.
They do not dissociate in water.
What is the role of water in the Arrhenius acid-base reaction?
It acts as a catalyst.
It is a reactant that forms ions.
It neutralizes the acid.
It is a product of the reaction.
Which of the following is NOT an Arrhenius acid?
Ammonia (NH3)
Sulfuric acid (H2SO4)
Hydrochloric acid (HCl)
Nitric acid (HNO3)
What is the primary characteristic of a strong acid compared to a weak acid?
It is less corrosive.
It produces fewer hydrogen ions.
It has a higher pH value.
It completely dissociates in water.
Which of the following is a common property of bases?
They turn litmus paper red.
They taste sour.
They feel slippery.
They produce hydrogen ions in solution.
What is the result of mixing a strong acid with a strong base?
Formation of a gas.
Formation of a precipitate.
Neutralization and formation of water and salt.
No reaction occurs.
A Bronsted Lowry acid:
donates H+ to another substance
accepts H+ from another substance
produces H+
produces OH-
A Bronsted Lowry base:
donates H+ to another substance
accepts H+ from another substance
produces H+
produces OH-
In the equation below, what is the Bronsted Lowry acid (donates H+)?
HCl + NH3 → Cl- + NH4+
HCl
NH3
Cl-
NH4+
In the equation below, what is the Bronsted Lowry base (accepts H+)?
HCl + NH3 → Cl- + NH4+
HCl
NH3
Cl-
NH4+
Which reactant in the following equation is a Bronsted Lowry acid?
H2O + HCl → H3O+ + Cl-
Water
Hydrogen chloride
Hydronium
Chloride
Which product in the following equation is a conjugate base?
H2O + HCl → H3O+ + Cl-
Water
Hydrogen chloride
Hydronium
Chloride
Classify this acid.
Arrhenius Acid
Bronsted Lowry Acid
Lewis Acid
HCl is:
an Arrhenius acid
a Bronsted Lowry acid
both an Arrhenius and Bronsted Lowry acid
a base
Classify the following molecule
Lewis Acid
Lewis Base
Acid-base conjugate pairs differ by a single
Electron
Proton
Neutron
Oxygen
Which of the following show an acid and its conjugate base pair (in that order)
H2SO4, SO42-
OH-, H2O
NH4+, H2O
H2CO3, HCO3-
HA(aq) + H2O ↔ H3O+ + A-
If there is a lot of product, what does that tell you about the acid?
What is Kw ?
Is the dissociation constant of weak acid reaction.
Is the dissociation constant of weak base reaction.
Is the dissociation constant of the Auto Ionization of water.
Is the dissociation constant of any equilibrium reaction.
a buffer solution is made by mixing HA, a weak acid, with salts containing A- ions.
HA ↔ H+ + A-
a formula that can be used for the calculation of the pH of this buffer solution is
a buffer solution is made of mixture of aqueous ethanoic acid, CH3COOH, with aqueous potassium ethanoate, KCH3COO.
the equilibrium reaction takes place in buffer solution is :
CH3COOH ↔ CH3COO- + H+
small amount of HCl is then added to that buffer solution.
What reaction take places at the buffer solution to resist change of pH caused by addition of acid?
CH3COO- + H+ → CH3COOH
CH3COO- + OH- → CH2COO2- + H2O
CH3COOH + H+ → CH3COOH2
CH3COOH + OH- → CH3COO- + H2O
Which of the following statements ARE TRUE about buffer solution?
(you may choose more than one answer)
pH of buffer solution will never change despite addition of small amount of base or acid
Buffer can be made by mixing weak acid and salt of its conjugate base or by mixing weak base with salt of its conjugate acid
Buffer has acid and base components that can work specifically to resist pH change
the closer the ratio of concentration weak acid/base to the concentration of salt of its conjugate base/acid, the less effective the buffer to resist pH change
The following statement is true for arrhenius acid and base EXCEPT
Arrhenius acid produces H+ ions
Arrhenius base produces OH- ions
H2O need to be present for Arrhenius acid base to dissociate
Hydrogen atoms make the solution acidic
dissociation of weak acid, HA, is represented by following equation :
HA(aq) + H2O(l) ⇌ H3O+(aq) + A-(aq)
The equilibrium constant for this reaction is represented by Ka . Which of the following equation represents expression of equilibrium constant, Ka?
Scale that measures how acidic or basic something is.
aH
bH
pH
Hp
H3O+ is called
Hydronium Ion
Hydroxide Ion
Hydrogen Ion
Fancy Water
OH- is called
Hydrondium Ion
Hydroxide Ion
Hydrogen Ion
Super Fancy Water
In pure water, the concentration of OH- is __________ the concentration of H3O+
greater than
smaller than
the same as
unrelated to
[H+] > [OH-]
A Lewis acid is any species that can accept an (a) from a base to form a chemical bond.
A/ An _____ contains hydroxide ions.
acid
anhydride
base
metal oxide
The self-ionization of water is called _____.
autohydrolysis
autoprotolysis
autoionization
water dialysis
