Activity: Buffers and the Bicarbonate Buffer System Learning objectives Predict

Question

Activity: Buffers and the Bicarbonate Buffer System Learning objectives Predict whether certain compounds can be components of a buffer Predict the effect on the bicarbonate buffer system in the blood under conditions of hyperventilation and hypoventilation Reason how the conditions of acidosis and alkalosis can be treated based on the bicarbonate buffer system What Constitutes a Buffer? A buffer resists a change in pH when small amounts acid or base are added. of It consists of a weak acid and the salt of its conjugate base (which is the ionic compound formed from the conjugate base typically with Na+ or K+ ions) OR a weak base and the salt of its conjugate acid Neither strong acids nor strong bases can be part of a buffer system. Because of this, it is important that you be able to identify the six strong acids and strong bases. Questions 1. Can the following compounds be part of a buffer system? If you said yes, provide the other component that would be present. Example: H2CO3. Since it is a weak acid, it can be part of a buffer system. A salt of its conjugate base would be NaHCO3, sodium bicarbonate. a. H SO b. KH PO c. CH COOH d. H2O Laura Activity 36 of Guided Inquiry for General Organic, and Biological Chemistry. Second Edition From Frost. Copyright 2014 by Pearson Education, Inc. All rights reserved 217

Explanation / Answer

Acid buffer solution A mixture of weak acid and its salt with strong base

B. H3PO4 + KH2PO4 it is acid buffer solution

C CH3COOH + CH3COONa it is acid buffer solution

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