Welcome to your Grade 12 Chemistry chapter 1
After carefully reading the following 30 questions, choose the correct answer.
1.
According to the Arrhenius concept, what characterizes a strong acid in aqueous solution?
2.
Which substance is an example of a strong base according to the text?
3.
What is the term for a reaction between two identical neutral molecules to produce an anion and a cation?
4.
In a Lewis acid-base reaction, how is a Lewis base defined?
5.
What is the value of the ion-product constant for water (Kw) at 25 °C?
6.
What results from the hydrolysis of a salt formed from a weak acid and a strong base?
7.
Which of the following is a drawback of the Arrhenius definition of acids and bases?
8.
What occurs at the end point of an acid-base titration using phenolphthalein?
9.
Which of the following is an amphiprotic species?
10.
In the reaction NH3+H2O⇌NH4++OH−, what is the conjugate acid of NH3?
11.
Which acid is commonly used as a flavoring in carbonated beverages?
12.
What is the pH of a solution where [H3O+]=3.2×10−5M?
13.
Which species acts as a Lewis acid in the reaction CaO+CO2→CaCO3?
14.
A strong acid solution is prepared by diluting HNO3 to 2.0 M. What is the [H+] of this solution?
15.
Which of the following salts forms an aqueous solution with pH = 7?
16.
What determines the strength of an acid in aqueous solution?
17.
In the Brønsted-Lowry concept, what is a base?
18.
What is the hydroxide ion concentration in a solution with a pOH of 4.82?
19.
Which of the following is true regarding a Brønsted-Lowry acid-base reaction?
20.
What is the relationship between pH and pOH at 25 °C?
21.
In the Lewis theory, BF3 acts as an acid because:
22.
What color does methyl orange turn in an acidic solution?
23.
Which of the following is a characteristic of weak electrolytes?
24.
The acidic ingredient in vinegar is:
25.
What is the [OH−] of a solution with a pOH of 10?
26.
In the auto-ionization of water, water molecules behave as:
27.
Which of the following is NOT true about Lewis bases?
28.
What is the pH of a cup of coffee with [OH−]=1.0×10−10M?
29.
Which acid is classified as a strong acid in the textbook?
30.
What is the purpose of using phenolphthalein in a titration of HCl and NaOH?
