Worksheet 7.2 Acid-Base Identification

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Chemistry

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Nov 24, 2024

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CLUE Curriculum Name: Florida International University PID: Worksheet 7.2 Acid-Base Identification Thinking about the various models for acid-base reactions that we have introduced and what characteristics are typical for acids versus bases, answer the following question. Arrhenius Acid-Base Model : (Simplest and we won’t really use this one – too limiting) An acid dissolves in water to give H + (a proton) A base dissolves in water to give OH (hydroxide) Bronsted-Lowry Acids and Bases: (More inclusive) An acid is a proton donor A base is a proton acceptor Lewis Acid-Base Model: (Most sophisticated model and most inclusive) A Lewis acid is an electron pair acceptor. A Lewis base is an electron pair donor. 1. Consider Lewis structure for methane (CH 4 ). a. If methane were to behave as an acid (if possible), draw the Lewis structure of its resulting conjugate base . b. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate base would form? (Does this situtation make sense)? c. If methane were to behave as a base (if possible), draw the Lewis structure of its resulting conjugate acid .
CLUE Curriculum Name: Florida International University PID: d. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate acid would form? (Does this situtation make sense)? e. Considering your responses to Parts B and D, would you predict methane would behave as an acid, a base, either, or neither? Explain your reasoning. 2. Consider Lewis structure for water (H 2 O). a. If water were to behave as an acid (if possible), draw the Lewis structure of its resulting conjugate base . b. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate base would form? (Does this situtation make sense)? c. If water were to behave as a base (if possible), draw the Lewis structure of its resulting conjugate acid . d. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate acid would form? (Does this situtation make sense)?
CLUE Curriculum Name: Florida International University PID: e. Considering your responses to Parts B and D, would you predict water would behave as an acid, a base, either, or neither? Explain your reasoning. 3. Consider Lewis structure for hydrogen fluoride (HF). a. If hydrogen fluoride were to behave as an acid (if possible), draw the Lewis structure of its resulting conjugate base . b. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate base would form? (Does this situtation make sense)? c. If hydrogen fluoride were to behave as a base (if possible), draw the Lewis structure of its resulting conjugate acid . d. Reflecting on your answer for Part A and using the three acid-base models above, would you predict the conjugate acid would form? (Does this situtation make sense)? e. Considering your responses to Parts B and D, would you predict hydrogen fluoride would behave as an acid, a base, either, or neither? Explain your reasoning.
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