Question: What is the relationship between pKa and Ka for a weak acid?
Options:
pKa = -log(Ka)
pKa = log(Ka)
pKa = Ka
pKa = 1/Ka
Correct Answer: pKa = -log(Ka)
Solution:
The relationship is given by the equation pKa = -log(Ka), where Ka is the acid dissociation constant.
What is the relationship between pKa and Ka for a weak acid?
Practice Questions
Q1
What is the relationship between pKa and Ka for a weak acid?
pKa = -log(Ka)
pKa = log(Ka)
pKa = Ka
pKa = 1/Ka
Questions & Step-by-Step Solutions
What is the relationship between pKa and Ka for a weak acid?
Step 1: Understand that Ka is a number that tells us how strong a weak acid is. It measures how well the acid can donate protons (H+ ions) in a solution.
Step 2: Realize that pKa is a way to express Ka in a simpler form. It is the negative logarithm of Ka.
Step 3: Use the formula pKa = -log(Ka) to find the relationship. This means if you know Ka, you can calculate pKa easily.
Step 4: Remember that a lower pKa value means a stronger acid, while a higher pKa value means a weaker acid.
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