Podcast
Questions and Answers
Based on what you have seen, which is the best definition for an acid?
Based on what you have seen, which is the best definition for an acid?
- Acids are corrosive
- Acids donate protons in aqueous solution (correct)
- Acids are always strong
- Acids accept protons
What results from a reaction of a base (BOH) and a hydronium ion (H3O+)?
What results from a reaction of a base (BOH) and a hydronium ion (H3O+)?
2 H2O + B+
What makes an acid acidic?
What makes an acid acidic?
chemical structure
Which unit is used to express the acidity of an acid or alkaline solution?
Which unit is used to express the acidity of an acid or alkaline solution?
What precautions should you take when working with strong acids and bases?
What precautions should you take when working with strong acids and bases?
What is the definition of a base?
What is the definition of a base?
If you have a glass of pure water, without any acids or bases, how many hydronium ions (H3O+) do you expect?
If you have a glass of pure water, without any acids or bases, how many hydronium ions (H3O+) do you expect?
According to the Bronsted-Lowry definition, what is water?
According to the Bronsted-Lowry definition, what is water?
Guess how many water molecules self-ionize in one liter of water!
Guess how many water molecules self-ionize in one liter of water!
What is the difference in concentration of hydronium ions between pH 1 and pH 4?
What is the difference in concentration of hydronium ions between pH 1 and pH 4?
How are the pOH and pH linked?
How are the pOH and pH linked?
Does the intake of acidic or alkaline foods affect the blood pH?
Does the intake of acidic or alkaline foods affect the blood pH?
What is the smallest pH possible?
What is the smallest pH possible?
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Study Notes
Acids
- Acids are substances that donate protons (H⁺) in aqueous solutions.
- The acidity of an acid is determined by its chemical structure.
- Water can act as both an acid and a base according to the Bronsted-Lowry definition.
Bases
- Bases are defined as substances that accept protons in chemical reactions.
- The reaction between a base (BOH) and a hydronium ion (H₃O⁺) produces two water molecules (2 H₂O) and a metal cation (B⁺).
pH and Acidity
- pH is used to measure the acidity or alkalinity of a solution.
- The relationship between pH and pOH is expressed as: pH + pOH = 14.
- The difference in concentration of hydronium ions between pH 1 and pH 4 is a factor of 1,000.
Water Properties
- In pure water, the concentrations of hydronium ions (H₃O⁺) and hydroxide ions (OH⁻) are equal.
- Approximately 0.0000001 moles of water molecules self-ionize in one liter.
Blood pH
- Consumption of acidic or alkaline foods does not significantly impact blood pH; it remains constant regardless of dietary intake.
Safety Precautions
- When handling strong acids and bases, it is essential to always wear goggles and gloves for protection.
Miscellaneous
- There is no fixed minimum for pH levels, indicating that theoretically, the pH can continue to decrease without limit.
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