Question

Classify each titration curve as representing a strong acid titrated with a strong base, a strong base titrated with a strong acid, a weak acid titrated with a strong base, a weak base titrated with a strong acid, or a polyprotic acid titrated with a strong base.

Answer 1

 From left to right: 

1) starts at high pH, no buffer zone - strong base being titrated with strong acid 
2) starts at low pH, no buffer zone - strong acid being titrated with strong base 
3) starts at low pH, shows a buffer zone - weak acid titrated with strong base 
4) starts at high pH, shows a buffer zone - weak base titrated with strong acid 
5) polyprotic due to two equivalence points 

Answer 2

Answers and explanations below (accompanied by pictures)

Further explanation

In Strong Acids and Strong Bases, initially the pH rises little by little. This is because the scale of the pH increase is logarithmic, which means that pH 1 has 10 times the acidity of pH 2. Then it rises sharply near the equivalent point. At this point, the remaining hydronium ions are low, and only a small amount of hydroxide ions is needed to raise the pH.

Explanation of weak acid and strong base titration curves:

• Weak acids have a low pH at first
• The pH rises faster at first, but less quickly when approaching the equivalent point
• The pH of the equivalence point is incorrect 7

The pH produced by titration of weak acids and strong bases rises faster at first, but less quickly when approaching the equivalent point.

Explanation of strong acid and weak base titration curves:

• Strong acids have a low pH at first
• The pH rises slowly at first but is fast when approaching the equivalence point
• The pH of the equivalence point is incorrect 7

the equivalent point for strong acids and weak bases has a pH of less than 7.

Weak acids and weak bases do not produce sharp curves, even as if they are irregular. In the titration curve of weak acids and weak bases, there is an inflection point that is almost similar to the equivalent point.

Titration is a way to find out the concentration of a solution by reacting with another solution, which is usually in the form of acid or base. Titration is generally done by adding titrants of known concentration through the burette of a titrate of a certain volume whose concentration is sought. In acidic and basic reactions, titration is very useful for measuring pH at various points through chemical reactions. The result is a titration. A titration curve is a graph as a function of pH with the number of titrants added.

Learn More

Titration https://brainly.com/question/2728613

Chemical reaction https://brainly.com/question/2728613

Details

Class: High School

Subject: Chemistry

Keywords: Titration, Acid, Base