Post-UTME Chemistry 2018 Objective — Question 2
Question 2 of 21 from the Post-UTME Screening (Post-UTME) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide will exactly neutralize 10cm^3 of 1.25 molar sulphuric acid?
- A. 5cm^3
- B. 10cm^3
- C. 20cm^3
- D. 50cm^3Correct
Explanation
2NaOH + H2SO4 -> Na2SO4 + 2H2O. Moles H2SO4 = 0.010L x 1.25 = 0.0125mol, needs 0.025mol NaOH. Volume = 0.025/0.5 = 0.05L = 50cm^3.
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