Acids and Bases
If the concentration of hydrogen ions is increased in a solution at equilibrium, which of the following will occur according to Le Chatelier's principle?
The equilibrium constant (K) value will increase.
The reaction rate of the forward reaction will increase.
The equilibrium will shift towards the reactants.
The pH of the solution will increase without affecting equilibrium.
What is the pH of a neutral solution at 25°C?
7
1
0
14
Which of the following solutions would have a pH less than 7 at standard room temperature?
0.1 M HCl
0.1 M NaOH
0.1 M Ca(OH)2
Pure water (H2O)
Which substance acts as a proton donor in an acid-base reaction?
Water
Acid
Salt
Base
What characteristic defines bases according to Lewis's theory?
A donation of electron pairs
Neither an electron donor nor a proton acceptor
Both a proton donor and an electron acceptor
An acceptor of protons
What is the product of the reaction when hydrochloric acid reacts with sodium hydroxide in a neutralization reaction?
Sodium bicarbonate and hydrochloric acid
Sodium chloride and water
Hydrogen gas and sodium chloride
Chlorine gas and sodium oxide
What happens to an exothermic acid-base neutralization reaction when temperature is increased?
The equilibrium shifts toward reactants, producing fewer products.
The rate of both forward and reverse reactions increases equally.
There is no change in position as temperature does not affect neutralization reactions.
More products are formed as higher temperature favors formation of more stable compounds.

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How does Brønsted-Lowry definition describe acids and bases?
Bases donate H+ ion whereas acids accept it.
Acids donate H+ ion whereas bases accept it.
Acids and bases are determined by their pH values.
Acids decrease H+ ion while bases increase it.
What do conjugate acid-base pairs have in common that distinguishes them from Lewis acid-base pairs?
They form coordinate covalent bonds.
They differ by a single proton (H+).
They act only as electron pair donors.
They share an equal number of electrons during reactions.
Which household substance can be used to neutralize an acidic bee sting?
Vinegar
Baking soda
Tomato juice
Lemon juice