Select the 4 titration combinations that might result in pH < 7.00 at the equiva

Question

Select the 4 titration combinations that might result in pH < 7.00 at the equivalence point Answer analyte = weak acid titrant = strong base analyte = strong base titrant = weak acid analyte = strong acid titrant = strong base analyte = strong base titrant = strong acid analyte = strong acid titrant = weak base analyte = weak base titrant = weak acid analyte = weak acid titrant = weak base analyte = weak base titrant = strong acid (I thought it was the oppisites.. so weak acid strong base, strong acid weak base, etc) KHP in water is a 1. strong acid 2. weak acid 3. strong base 4. weak base. (I know it is an acid) True/False Acid base neutralization reactions (e.g.titrations) can be considered to go to completely to the right.

Explanation / Answer

When the acid is strong and the base is weak, we can expect a pH < 7.00 at the equivalence point. Also if the weak acid is stronger than the weak base, we can expect a ph<7.00 at the equivalence point. So the combinations with pH< 7.00 at the equivalence point are:

analyte = strong acid titrant = weak base

analyte = weak base titrant = strong acid

analyte = weak base titrant = weak acid

analyte = weak acid titrant = weak base

KHP in water is a weak acid

Acid base neutralization reactions (e.g.titrations) can be considered to go to completely to the right.

When a weak acid reacts with a weak base, both the reactants do not dissociate completely in solution. So the reaction cannot be considered to go to completion/ completely to the right. Hence the statement is False

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