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Questions and Answers
Which of the following is a simplified definition of an acid and a base?
Which of the following is a simplified definition of an acid and a base?
- An acid increases the concentration of hydroxide (OH-) in a solution, while a base decreases the pH by providing hydrogen ions (H+) or another ion or molecule that adds hydroxide ions to solution.
- An acid decreases the concentration of hydroxide (OH-) in a solution, while a base decreases the pH by providing hydrogen ions (H+) or another ion or molecule that removes hydroxide ions from solution.
- An acid increases the concentration of hydrogen ions (H+) in a solution, while a base raises the pH by providing hydroxide (OH-) or another ion or molecule that removes hydrogen ions from solution. (correct)
- An acid decreases the concentration of hydrogen ions (H+) in a solution, while a base raises the pH by providing hydroxide (OH-) or another ion or molecule that adds hydrogen ions to solution.
What happens to the concentration of hydrogen ions (H+) in a solution when an acid is added?
What happens to the concentration of hydrogen ions (H+) in a solution when an acid is added?
- The concentration of hydrogen ions (H+) decreases.
- The concentration of hydrogen ions (H+) can increase or decrease depending on the acid.
- The concentration of hydrogen ions (H+) increases. (correct)
- The concentration of hydrogen ions (H+) remains the same.
What happens to the pH of a solution when a base is added?
What happens to the pH of a solution when a base is added?
- The pH of the solution remains the same.
- The pH of the solution increases. (correct)
- The pH of the solution decreases.
- The pH of the solution can increase or decrease depending on the base.
Which of the following is true about the pH scale?
Which of the following is true about the pH scale?
Where can you find other acid-base definitions?
Where can you find other acid-base definitions?
Which of the following is true about phase transitions?
Which of the following is true about phase transitions?
What causes a phase transition to occur?
What causes a phase transition to occur?
Which of the following is an example of a discontinuous phase transition?
Which of the following is an example of a discontinuous phase transition?
What defines the phase transition point?
What defines the phase transition point?
Which of the following is NOT a state of matter commonly involved in phase transitions?
Which of the following is NOT a state of matter commonly involved in phase transitions?
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Study Notes
Acid-Base Definitions
- A simplified definition of an acid is a substance that donates a hydrogen ion (H+), and a base is a substance that accepts a hydrogen ion (H+).
Effects of Acids and Bases on Solutions
- When an acid is added to a solution, the concentration of hydrogen ions (H+) increases.
- When a base is added to a solution, the pH of the solution increases (becomes more alkaline).
pH Scale
- The pH scale is a logarithmic scale that measures the concentration of hydrogen ions (H+) in a solution.
Additional Resources
- Other acid-base definitions can be found in the Arrhenius, Bronsted-Lowry, and Lewis definitions.
Phase Transitions
- Phase transitions occur when a substance changes from one state of matter to another.
- A phase transition is caused by a change in temperature or pressure.
Characteristics of Phase Transitions
- A discontinuous phase transition is an example of a phase transition where the properties of the substance change abruptly, such as the melting of ice.
Phase Transition Point
- The phase transition point is the temperature or pressure at which a phase transition occurs.
States of Matter
- Plasma is not a state of matter commonly involved in phase transitions.
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