

pH Calculations and Weak Acids
Interactive Video
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What two key pieces of information are needed to calculate the pH of a weak acid solution?
Concentration of the acid and its molecular weight
Molecular weight of the acid and the volume of the solution
Concentration of the acid and the acid dissociation constant (Ka)
Volume of the solution and the acid dissociation constant (Ka)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a higher Ka value affect the acidity of a solution?
It makes the solution less acidic
It has no effect on the acidity
It makes the solution more acidic
It neutralizes the solution
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about negative exponents in Ka values?
A smaller negative exponent means a larger Ka value
Negative exponents make Ka values zero
A larger negative exponent means a larger Ka value
Negative exponents do not affect Ka values
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in setting up the equation for pH calculation of a weak acid?
Measure the temperature of the solution
Determine the molecular weight of the acid
Calculate the volume of the solution
Set up the equation for the acid dissociation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of weak acids, what does the term 'conjugate base' refer to?
The solution's pH level
The original acid molecule
The base formed after the acid donates a proton
The acid formed after the base accepts a proton
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What assumption can be made to simplify the algebraic solution of the pH equation?
Assume the dissociation is negligible
Assume the solution is at boiling point
Assume the acid completely dissociates
Assume the solution is neutral
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which mathematical method can always be used to solve the pH equation for weak acids?
Quadratic formula
Matrix inversion
Logarithmic transformation
Linear regression
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