Calcium Analysis in Limestone

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What is the purpose of using Methyl Orange in the experiment?

To test for the presence of some ions
To indicate the completion of the chemical reaction
To note the neutralization point of the reaction (correct)
To determine the amount and percentage of calcium in limestone

What is the principle behind the use of an indicator like Methyl Orange?

An indicator changes color to indicate the neutralization point of the reaction (correct)
An indicator is used to determine the amount and percentage of calcium in limestone
An indicator helps in washing the apparatus properly with water
An indicator is a substance that changes color to indicate the completion of a chemical reaction

What is the function of NaOH (0.5 N) in the experiment?

To wash the apparatus properly with water
To neutralize the excess Hydrochloric Acid (correct)
To indicate the completion of the chemical reaction
To determine the amount and percentage of calcium in limestone

Why is it important to fill the burette with alkali?

To use it for neutralization in the experiment (B) Signup and view all the answers

What is the role of Hydrochloric Acid in the experiment?

To react with calcium carbonate and form calcium chloride (D) Signup and view all the answers

What is the purpose of using Methyl Orange in the experiment?

To indicate the neutralization point of the reaction (B) Signup and view all the answers

What is the principle behind using an indicator in the experiment?

To indicate the completion of a chemical reaction (C) Signup and view all the answers

Which chemical is used to neutralize the reaction in the experiment?

Hydrochloric Acid (D) Signup and view all the answers

Explain the purpose of using hydrochloric acid and NaOH in the experiment.

Hydrochloric acid is used to dissolve the limestone (calcium carbonate) and NaOH is used to neutralize the excess acid after the reaction with the limestone. Signup and view all the answers

What is the function of NaOH in the experiment?

To neutralize the reaction (B) Signup and view all the answers

Describe the role of Methyl Orange as an indicator in the experiment.

Methyl Orange is used to indicate the neutralization point of the reaction between the strong acid (HCl) and the base (NaOH) by changing color. Signup and view all the answers

Why is the burette filled with alkali in the experiment?

To use in the neutralization reaction (D) Signup and view all the answers

Why is it important to wash the apparatus properly with water before conducting the experiment?

Washing the apparatus properly with water removes any impurities or residues that could interfere with the experiment or cause inaccurate results. Signup and view all the answers

What is the eventual reaction when an indicator like Methyl Orange is used in the experiment?

The eventual reaction involves the combination of H ions and OH ions to form water, and the indicator changes color to signal the presence of these ions and the completion of the reaction. Signup and view all the answers

Explain the principle behind the use of an indicator like Methyl Orange in the experiment.

An indicator like Methyl Orange changes color to indicate the completion of a chemical reaction, particularly at the neutralization point when a strong acid reacts with a base. Signup and view all the answers

What is the purpose of using an indicator in the calcium carbonate experiment?

The purpose of using an indicator is to note the neutralization point of the reaction of strong acids with bases. Signup and view all the answers

How is an indicator defined in the context of the experiment?

An indicator is defined as a substance that changes color to indicate the completion of a chemical reaction and can be used to test for a particular substance. Signup and view all the answers

What is the principle behind the use of an indicator like Methyl Orange in the experiment?

The principle is that Methyl Orange is used to note the neutralization point of the reaction of strong acids with bases, indicating the completion of the reaction. Signup and view all the answers

What is the eventual reaction when an indicator like Methyl Orange is used in the experiment?

The eventual reaction is the presence of H ions or OH ions to form water, as the indicator changes color to indicate the reaction. Signup and view all the answers

What is the role of the indicator in the calcium carbonate experiment?

The role of the indicator is to indicate the completion of the neutralization reaction between the acid and the base in the experiment. Signup and view all the answers