Home
Class 11
CHEMISTRY
0.7 of zinc dust containing Zn and ZnO ...

`0.7 ` of zinc dust containing Zn and ZnO when dissolved in dilute `H_(2)SO_(4)` evolved `224 mL` of `H_(2)` at `N.T.P.` Calculate the percentage of zinc in the dust (Atomic mass of `Zn = 65`).

Text Solution

AI Generated Solution

To solve the problem, we need to calculate the percentage of zinc in the zinc dust sample based on the volume of hydrogen gas evolved when the sample is dissolved in dilute sulfuric acid. Here’s a step-by-step breakdown of the solution: ### Step 1: Understand the reaction When zinc (Zn) and zinc oxide (ZnO) react with dilute sulfuric acid (H₂SO₄), they produce zinc sulfate (ZnSO₄) and hydrogen gas (H₂). The relevant reactions are: 1. Zn + H₂SO₄ → ZnSO₄ + H₂ 2. ZnO + H₂SO₄ → ZnSO₄ + H₂O ### Step 2: Calculate the moles of hydrogen gas produced ...
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

1.67 g mixture of Al and Zn was completely dissolved in acid and evolved 1.69 L of H_2 at STP. Calculate the weight Al and Zn in the mixture.

12. g of an impure sample of arsenious oxide was dissolved in water containing 7.5 g of sodium bicarbonate and the resulting solution was diluted to 250 mL . 25 mL of this solution was completely oxidised by 22.4 mL of a solution of iodine. 25 mL of this iodine solution reacted with same volume of a solution containing 24.8 g of sodium thiosulphate (Na_(2)S_(2)O_(3).5H_(2)O) in one litre. Calculate teh percentage of arsenious oxide in the sample ( Atomic mass of As=74 )

Knowledge Check

  • Assertion: 65.38 g of Zn when treated with excess of dilute H_2SO_4 , will always form 22.4 L of H_2 at S.T.P. Reason: The yield of a product is always in accordance with the stoichiometry of the reaction.

    A
    If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
    B
    If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
    C
    If Assertion is CORRECT but Reason is INCORRECT
    D
    If Assertion is INCORRECT but Reason is CORRECT.

    • Similar Questions

    Explore conceptually related problems

    Why Zn reacts with dilute H_(2)SO_(4) to give H_(2) gas but Cu does not ?

    20mL of H_(2)O_(2) after acidification with dilute H_(2)SO_(4) required 30mL of N/2 KMnO_(4) for complete oxidation. Calculate the percentage of H_(2)O_(2) in the solution. Equivalent mass of H_(2)O_(2)=17 .

    What happens when a sulphite reacts with dilute H_(2)SO_(4) in presence of zinc ?

    Zinc sulphide reacts with dilute H_(2)SO_(4) to liberate which gas.

    The amount of zinc required to produce 224 ml of H_(2) at STP on treatment with dilute H_(2)SO_(4) will be (Zn = 65)

    A dilute solution of H_(2)SO_(4) is made by adding 5 mL of 3N H_(2)SO_(4) to 245 mL of water. Find the normality and molarity of the diluted solution.

    Find out the weight of H_(2)SO_(4) in 150 mL, (N)/(7)H_(2)SO_(4) .

    Home
    Profile