Question 5.C-A.62: A student used a constant immersion hydrometer to determine ...

Pearson IIT Foundation Series Physics Class 10

A student used a constant immersion hydrometer to determine the concentration of hydrochloric acid. A test tube of weight 50 gf with 10 lead shots each of weight 5 g floats in water to a mark x on it. To keep the test tube float at the same mark in the HCl solution, he added 2 lead shots into it. Determine the volume percentage of the solution.

(Given density of pure water is 1g $cm^{-3}$ and density of HCl is 1.18 g $cm^{-3}$ )

Volume percentage $=\frac{\text { volume of solute }}{\text { volulme of solution }} \times 100$

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