Questions and Answers
Which of the following is NOT a type of laboratory glassware?
What does pH measure?
A solution with a pH less than 7 is considered neutral.
False
What is the formula for calculating pH?
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What is the range of pH values?
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Who proposed the Bronsted-Lowry theory?
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Acids are substances that can donate a ______ ion.
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Bases are substances that accept ______ ions.
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Define potential of hydroxide (pOH).
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Study Notes
Laboratory Glasswares
- Essential for performing biochemical analyses with specific functions in the laboratory.
- Key glassware types include graduated cylinders, beakers, Erlenmeyer flasks, test tubes, crucibles, and more.
- Devices like spectrophotometers, analytical balances, and micropipettes aid in experiments.
- Common lab functions: measuring solutions, holding reagents, facilitating chemical reactions, and heating.
pH and Its Importance
- pH measures the acidity or basicity of a solution, with a scale ranging from 0 to 14.
- Acidic solutions have pH < 7, neutral solutions have pH = 7, and basic solutions have pH > 7.
- Hydrogen ion (H+) concentration directly affects biochemical reactions in living organisms.
Definition of pOH
- pOH measures hydroxide ion (OH-) concentration and is represented as the negative logarithm of [OH-].
- The relationship between pH and pOH allows for a comprehensive understanding of solution properties.
Definitions of Acids and Bases
- Svante Arrhenius: Acids produce H+ ions in an aqueous solution; bases produce OH- ions.
- Gilbert N. Lewis: Acids are electron-pair acceptors, while bases are electron-pair donors.
- Bronsted-Lowry Theory: A more widely accepted definition where acids are proton donors and bases are proton acceptors.
Reaction Between HCl and Water
- Not explicitly detailed, but implies that the reaction demonstrates the transfer of protons, relevant to understanding acidity.
Role of Buffers
- Buffers help maintain stable pH levels in biological systems, supporting homeostasis in organisms.
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Description
Test your knowledge on laboratory glassware and apparatus used in biochemistry. This quiz covers essential tools required for performing biochemical analyses effectively. Perfect for 2nd-year BSMT students preparing for their midterms.
