A student is asked to prepare a buffer with a pH of 5.40 by adding sodium hydroxide to a weak acid. a. Which of the following acids should be used? Explain HA (Ka = 1.1x10-³) HB (Ka = 4.4 x 10-6) HC (K₂= 2.6 x 10⁹) b. What is the purpose of the sodium hydroxide?

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A: Acids- donate H+ ions  Base - donate OH- ions

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A: Given that, the reaction is:

Q: e) OCHECH3 1) NaOCH₂CH3 (1 eq) 2) BrCHCOCHCH 3) aq NaOH 4) aq HCI/heat

A: Given that, the reaction is:

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A: A question based on molecule that is to be accomplished.

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A: The answer is given as follows

Q: What is the conjugate base of HSO4°? 22 SO42 H2SO4 S03 H2O II III IV Multiple Choice II II IV

A: Given ion is HSO4-  It is an acidic anion because it donates H+ in aqueous solution.

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.