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12 Questions

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Chemistry Titration Experiment

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Questions and Answers

What is the purpose of using an indicator like methyl orange in the titration experiment?

To neutralize the sulfuric acid

To increase the reaction rate

To indicate the color change at the endpoint of titration (correct)

To measure the exact volume of sodium hydroxide

Why is it important to ensure the meniscus of the sodium hydroxide solution is at the pipette's line during measurement?

To speed up the titration process

To prevent spillage of the solution

To avoid air bubbles in the pipette

To ensure accurate volume measurement (correct)

What type of glassware is used to hold the sulfuric acid during the titration process?

Bulb pipette

Burette (correct)

Beaker

Safety filler

What is the purpose of doing a rough titration before conducting accurate titrations?

To estimate the volume of acid needed Signup and view all the answers

How is concentration calculated in the titration process?

Concentration = moles/volume Signup and view all the answers

What is the purpose of using safety fillers when filling the bulb pipette with sodium hydroxide solution?

To prevent spillage of the solution Signup and view all the answers

Explain the role of a bulb pipette in the titration experiment.

The bulb pipette is used to measure exact volumes, in this case, 25 centimeters cubed of the sodium hydroxide solution. Signup and view all the answers

Why is it necessary to perform a rough titration before conducting accurate titrations?

The rough titration provides an estimate of the volume of acid required to neutralize the sodium hydroxide, guiding the subsequent accurate titrations. Signup and view all the answers

How does the meniscus formation in the pipette affect the accuracy of the titration process?

The meniscus formation, caused by water's stickiness, can lead to incorrect volume readings if not considered during measurement. Signup and view all the answers

What is the significance of using an indicator in the titration experiment?

The indicator helps in visually identifying the endpoint of the titration by changing color when the reaction is complete. Signup and view all the answers

Explain why the balanced chemical equation is crucial for calculating the concentration of the sulfuric acid.

The balanced equation provides the mole ratio between the reactants, which is essential for determining the exact concentration of the sulfuric acid. Signup and view all the answers

How does the use of a burette contribute to the precision of the titration process?

The burette allows acid to be dispensed drop-wise, enabling precise control over the amount added and facilitating the observation of the endpoint. Signup and view all the answers

Study Notes

Titration is used in chemistry to determine the concentration of an unknown solution.
The experiment involves a reaction between sodium hydroxide (0.1 mol/dm³) and sulfuric acid (unknown concentration, estimated around 0.05 mol/dm³).
A bulb pipette is used to measure exactly 25 cm³ of sodium hydroxide solution.
Safety fillers are used to fill the pipette without mouth suction due to safety reasons.
The meniscus, a curved surface caused by water's slight stickiness, must be at the pipette's line for accurate volume measurement.
Sulfuric acid is placed in a burette (graduated glassware) for accurate volume measurement.
An indicator (methyl orange) is added to the sodium hydroxide solution for color change indication during titration.
Rough titration is done first to estimate the volume of acid needed, followed by accurate titrations by adding acid drop-wise to reach the endpoint.
The balanced equation between sodium hydroxide and sulfuric acid (2:1 ratio) is crucial for calculating the unknown acid's concentration.
Concentration is calculated using the formula: Concentration = moles/volume, where moles are determined by the balanced equation's ratio and the initial moles of sodium hydroxide used.

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Description

Learn about the titration experiment in chemistry to determine the concentration of an unknown sulfuric acid solution using sodium hydroxide. Understand the equipment and steps involved, including the use of bulb pipette, safety fillers, burette, and indicator for accurate volume measurement.