Horvath Practice Problems 56

Horvath Practice Problems 56 - f nal pH to be basic....

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
14 REACTIONS WITH WEAK ACIDS AND WEAK BASES We have learned how to determine the pH of a weak acid or weak base solution. We will now extend that to include calculating the pH after a acid—base reaction. Reaction Between a Monoprotic Weak Acid and a Strong Base We f rst consider a reaction between a weak monoprotic weak acid with a strong base. We will take the reactants to be present in stoichiometric ratios. We will not consider limiting reagent cases until later. Since this is a reaction between a weak base and a strong base we would expect the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: f nal pH to be basic. Example : What is the f nal pH if 25 ml of a 0.10 M niacin (HC 6 H 4 NO 2 ) is reacted with 25 ml of 0.10M NaOH. For niacin the K a = 1 . 4 10 5 . We f rst write a balanced reaction, HC 6 H 4 NO 2 + NaOH NaC 6 H 4 NO 2 + H 2 O. (14.1) It is convenient to express the net ionic equation, HC 6 H 4 NO 2 + OH C 6 H 4 NO 2 + H 2 O. (14.2) We know that sodium hydroxide is a strong base so it fully dissociates to produce OH . REACTIONS WITH WEAK ACIDS AND WEAK BASES 55...
View Full Document

Ask a homework question - tutors are online