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Naman and Raghav perform an experiment i...

Naman and Raghav perform an experiment in which they mix concentrated sulphuric acid with water. Naman mixes water with acid Raghav mixes acid with water slowly with constant stirring. Mention the suitable reason for selecting the one which you find is correct mehod and discarding the one which is wrong.

Text Solution

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Both the dilution processes have no difference as far as the acid whichn is formed. But in this case, there is a big problem. Concentrated sulphuric sulphuric acid has a strong affinity with water and the dilution is highly exothermic. If water is added to acid for dilution, so much heat is evolved that acid is immediately converted into poisonous vapours which pollute the atmosphere. In order to avoid this, it is always better to add acid slowly to water with constant stirring. Heat is released slowly and no vapours are formed. This means that the dilution process carried by Raghav is correct.
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Explore conceptually related problems

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

Knowledge Check

  • SO_(2) turns into which acid when mixed with water

    A
    `H_(2)SO_(2)`
    B
    `H_(2)SO_(3)`
    C
    `H_(2)SO_(4)`
    D
    None of the above

  • Which one of the following reacts with concentrated sulphuric acid

    A
    Au
    B
    Ag
    C
    Pt
    D
    Pb

  • Assertion(A): The acids must always be added slowly to water with constant stirring. Reason (R):Dissolving an acid or a base in water in highly exothermic reaction.

    A
    Both A and R are true, and R is the correct explanation of A.
    B
    Both A and R are true, but R is not the correct explanation of A.
    C
    A is true but R is false.
    D
    A is false but R is true.

    • Similar Questions

    Explore conceptually related problems

    While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory , the concentrated sulphuric acid is added slowly to water constant stirring .

    Answer question numbers (a) – (d) on the basis of your understanding of the following paragraph and related studied concepts. The process of dissolving an acid or a base in water is a highly exothermic one. Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating. Look out for the warning sign on the can of concentrated sulphuric acid and on the bottle of sodium hydroxide pellets. Mixing an acid or base with water results in decrease in the concentration of ions (H_3O^+//OH^-) per unit volume. Such a process is called dilution and the acid or the base is said to be diluted. What will be the consequences if dilution of acid is not carried out slowly?

    Answer question numbers (a) – (d) on the basis of your understanding of the following paragraph and related studied concepts. The process of dissolving an acid or a base in water is a highly exothermic one. Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating. Look out for the warning sign on the can of concentrated sulphuric acid and on the bottle of sodium hydroxide pellets. Mixing an acid or base with water results in decrease in the concentration of ions (H_3O^+//OH^-) per unit volume. Such a process is called dilution and the acid or the base is said to be diluted. Tell whether heat is absorbed or evolved when an acid or base is dissolved in water

    Answer question numbers (a) – (d) on the basis of your understanding of the following paragraph and related studied concepts. The process of dissolving an acid or a base in water is a highly exothermic one. Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating. Look out for the warning sign on the can of concentrated sulphuric acid and on the bottle of sodium hydroxide pellets. Mixing an acid or base with water results in decrease in the concentration of ions (H_3O^+//OH^-) per unit volume. Such a process is called dilution and the acid or the base is said to be diluted. How should acids be diluted ?

    Answer question numbers (a) – (d) on the basis of your understanding of the following paragraph and related studied concepts. The process of dissolving an acid or a base in water is a highly exothermic one. Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating. Look out for the warning sign on the can of concentrated sulphuric acid and on the bottle of sodium hydroxide pellets. Mixing an acid or base with water results in decrease in the concentration of ions (H_3O^+//OH^-) per unit volume. Such a process is called dilution and the acid or the base is said to be diluted. What is meant by dilution of an acid or a base ?

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