why cant u use calcium with dil sulphuric acid to prepare hydrogen in labrotory method

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Solution

Calcium and sulfuric acid certainly DO give off hydrogen gas:

Ca + H2SO4 = CaSO4 + H2(g)

ΔG(20C) = -631.5kJ (negative, so the reaction runs)

ΔH(20C) = -619.9kJ (negative, so the reaction is exothermic – very exothermic!)

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Similar questions

Q. Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen. Explain why?

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

Q. Give a reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.

Q. Sulphuric acid can be used In the laboratory to prepare the following substances :
(a) Hydrogen (b) Carbon dioxide
(c) Carbon monoxide (d) Sulphur dioxide
(e) Hydrogen chloride (f) Hydrogen sulphide
(g) Nitric acid.
1. Derive a balanced equation for each of the shove preparation.
2. In which of the reactions would you use (give numbers only): (i) Dilute Sulphuric acid, (ii) Sulphuric acid.
3. State the chemical property of sulphuric acid illustrated in each of these reactions.

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equations for the reactions from which the following gases are obtained, using dilute sulphuric acid as one of the reactants:
(i) Hydrogen
(ii) Carbon dioxide
(iii) Sulphur dioxide

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why cant u use calcium with dil sulphuric acid to prepare hydrogen in labrotory method

Calcium and sulfuric acid certainly DO give off hydrogen gas: Ca + H2SO4 = CaSO4 + H2(g) ΔG(20C) = -631.5kJ (negative, so the reaction runs) ΔH(20C) = -619.9kJ (negative, so the reaction is exothermic – very exothermic!)

Calcium and sulfuric acid certainly DO give off hydrogen gas:

Ca + H2SO4 = CaSO4 + H2(g)

ΔG(20C) = -631.5kJ (negative, so the reaction runs)

ΔH(20C) = -619.9kJ (negative, so the reaction is exothermic – very exothermic!)