What are pH curves used for?
Plotting the pH of the solution in the flask against the amount of acid or base added produces a titration curve. The shape of the curve provides important information about what is occurring in solution during the titration.
What is pH titration curve?
A titration curve is the plot of the pH of the analyte solution versus the volume of the titrant added as the titration progresses.
What are the neutralization curves?
A plot of pH against the volume of alkali added (mL) is known as a neutralization or titration curve (Fig. 22.2). The curve is generated by a ‘potentiometric titration’ in which pH is measured after each addition of alkali (or acid).
Why are titration curves so steep?
Near the equivalence point, a change of a factor of 10 occurs very quickly, which is why the graph is extremely steep at this point. As the hydronium ion concentration becomes very low, it will again take a lot of base to increase the hydroxide ion concentration by 10 fold to change the pH significantly.
How do titrations work?
Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration until the reaction reaches neutralization, which is often indicated by a color change.
Why are titration curves important?
Titration curves show how the pH of the solution changes as a known chemical is added to the solution, so any point along the curve gives you information on solution pH as the volume of the known chemical increases.
What do titration curves tell us?
A titration curve is a graphical representation of the pH of a solution during a titration. In a strong acid-strong base titration, the equivalence point is reached when the moles of acid and base are equal and the pH is 7. In a strong acid-weak base titration, the pH is less than 7 at the equivalence point.
Why do titration curves level off?
All acid titration curves follow the same basic shapes. In the beginning, the solution has a low pH and climbs as the strong base is added. As the solution nears the point where all of the H+ are neutralized, the pH rises sharply and then levels out again as the solution becomes more basic as more OH- ions are added.
What is Karl Fischer principle and reaction?
The principle of Karl Fischer titration is based on the oxidation reaction between iodine and sulphur dioxide. Water reacts with iodine and sulphur dioxide to form sulphur trioxide and hydrogen iodide. An endpoint is reached when all the water is consumed.
What is pM indicator?
A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. Complexometric indicators are also known as pM indicators.