If 9.8g of sulfuric acid is dissolved in excess quantity of water, it will yield _ moles of hydrogen ion (H+) and _ moles of sulphate ions (SO42-):
Correct answer: D. 0.2, 0.1
- A. 0.1, 0.2
- B. 0.1, 0.3
- C. 0.2, 0.4
- D. 0.2, 0.1
Explanation
The mole is a SI unit of measurement that is used to calculate the quantity of any substance. Molar mass H₂SO₄ = 98 g/mol 9.8 g H₂SO₄ = 0.1 mol H₂SO₄ produces 2H+ ions Therefore, [H+] = 0.2 M H₂SO₄ → 2H+ + SO₄2- Thus, the 0.1 mol H₂SO₄ will produce 0.2 mol H+ and the moles of sulfate ion is 0.1
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About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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