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April 18, 2014

Homework Help: Chemistry- Acids and Buffers

Posted by Tasneem on Monday, April 9, 2012 at 4:21am.

Cyanic Acid is a weak acid

HOCN + H2O <--> H3O+ +OCN- ka= 3.5*10^-4

a) if 2.5ml of 0.01 M cyanic acid solution is added to 25.0 ml of a formis acid buffer with ph = 3.70, what is the ratio of [OCN-]/[HOCN] in the resulting solution?

b) determine the pH of a 0.500 M solution of cyanic acid

c) calculate the pH of a solution that results from titrating 0.0500 moles of cyanic acid to the equivalence point with an equal number of moles of OH-, if the final volume of the solution is 150.0 mL

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