Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
hydroxide
B
hydrogen
C
carbonate
D
sulfate
Understanding the Answer
Let's break down why this is correct
Answer
A lower pH means the liquid is more acidic, which happens when there are more hydrogen ions present. The pH scale measures how many H⁺ ions are dissolved in the liquid, so the smaller the pH number, the higher the concentration of H⁺. Universal indicator paper changes color according to the amount of H⁺, turning more red as acidity increases. For example, if you dip paper in vinegar (pH about 2. 5), the paper turns bright red, showing many H⁺ ions in the solution.
Detailed Explanation
A lower pH means the solution is more acidic. Other options are incorrect because Hydroxide ions make a solution basic, not acidic; Carbonate ions are part of a buffer system, but they do not directly raise acidity.
Key Concepts
pH scale
acidity and alkalinity
universal indicator
Topic
pH Testing of Common Liquids
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1Arrange the following steps in the correct order for testing the pH of a liquid using universal indicator paper: A) Dip the indicator paper into the liquid, B) Compare the color change of the paper to the pH scale, C) Record the pH value, D) Prepare the liquid sample if needed.
mediumChemistry
Practice
2
Question 2Which of the following liquids would you classify as acidic based on its pH level when tested with universal indicator paper?
easyChemistry
Practice
3
Question 3Which of the following liquids is most likely to have a pH below 7 when tested with universal indicator paper?
easyChemistry
Practice
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