Table of Contents
What are the variables of titration?
The titration curve has basically two variables: The volume of the titrant as the independent variable. The signal of the solution, e.g. the pH for acid/base titrations as the dependent variable, that depends on the composition of the two solutions.
What are the dependent variables in a titration?
In the data obtained from a titration experiment, the independent variable (stimulus) is often the mass or volume of the titrant, and the dependent variable (response) is the measured response quantity.
What would be the control variable in a titration experiment?
– Dependent Variable: The molarity of acid. – Controlled Variables: The molarity of sodium hydroxide (1M), the type of vinegar (CH3OOH), room temperature, pressure, the addition of phenolphthalein indicator (3 drops), the volume of distilled water into the acid (50 mL).
What 4 quantities are involved in titration?
There are four parts to the titration curve of a weak acid (analyte) with a strong base(titrant).
- Initial pH (pH of a weak acid)
- Buffer Equation (Henderson Hasselbach Eq.)
- Equivalence Point (salt of weak acid)
- Excess Base (pH based on concentration of excess titrant)
What is titration experiment in chemistry?
A titration is an experiment where a volume of a solution of known concentration is added to a volume of another solution in order to determine its concentration. A commonly used indicator for strong acid-strong base titrations is phenolphthalein.
Which indicator is used in potentiometric titration?
Potentiometric titration is a technique similar to direct titration of a redox reaction. It is a useful means of characterizing an acid. No indicator is used; instead the potential is measured across the analyte, typically an electrolyte solution.
What are the different kinds of variable?
Types of variables
- Independent variables. An independent variable is a singular characteristic that the other variables in your experiment cannot change.
- Dependent variables.
- Intervening variables.
- Moderating variables.
- Control variables.
- Extraneous variables.
- Quantitative variables.
- Qualitative variables.
Which is the independent variable in a titration curve?
Titrations are often recorded on titration curves, whose compositions are generally identical: the independent variable is the volume of the titrant, while the dependent variable is the pH of the solution (which changes depending on the composition of the two solutions).
What are the quirks of the titration method?
Finally, each titration has its own quirks. They are usually related to chemical characteristics of titrant and other substances involved – NaOH used as a titrant tends to adsorb atmospheric CO 2, KMnO 4 and thiosulfate slowly decompose and so on. These will be addressed on individual titration procedure pages.
Which is the equivalence point in acid base titration?
Equivalence point: point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution. At the equivalence point in an acid-base titration, moles of base = moles of acid and the solution only contains salt and water. Acid-base titrations are monitored by the change of pH as titration progresses
Why do you need the correct temperature range for titration?
Some reactions need correct temperature range to keep stoichiometry (avoid side reactions). Losing solution – too vigorous swirling can end in liquid splashing from the titration flask before the end point had been reached. It may also happen that some titrant lands on the table instead of inside the flask.