Calculate the Ka of the weak acid from the information given below. Report your Ka to 2 significant figures in the following form: 0.0040 would be entered as 4.0E-3. 30.0 mL of a 0.20 M weak acid solution is titrated with 0.10 M NaOH. After 20.0 mL NaOH addition, the pH was 5.00. The Ka of the weak acid is

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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.