Question 3
Mole Concept and StoichiometryThe number of hydrogen ions in 4.9 g of tetraoxosulphate (VI) acid is [S = 32, O = 16, H = 1, NA = 6.02 x 1023]
- A.3.01 x 1022
- B.6.02 x 1022
- C.3.01 x 1023
- D.6.02 x 1023
Show the answer and explanation
Answer: B (6.02 x 1022)
Explanation
H2SO4 has M = 98, so 4.9 g is 0.05 mol. Each molecule gives 2 H+, so 0.10 mol of H+ = 0.10 × 6.02 × 1023 = 6.02 × 1022 ions.