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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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.