Neco Model Questions Vol1 2017 Chemistry Question 1
Practice practical question 1 from the 2017 Neco Model Questions Vol1 Chemistry examination. This question covers Atomic Structure, Stoichiometry, Gas Laws .
A clean piece of an unknown metallic element was weighed accurately and then reacted with excess dilute hydrochloric acid in a closed eudiometer tube to liberate hydrogen gas. The experiment was carried out at 25 °C. The initial pressure of the system (air + water vapour) was 760 mm Hg. After the reaction, the volume of gas collected over water was 125 mL. The water‑vapour pressure at 25 °C is 23.8 mm Hg. The mass of the metal sample before the reaction was 0.512 g. (Assume the reaction proceeds according to M + 2HCl → MCl₂ + H₂).
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This is Neco Model Questions Vol1 2017 Chemistry Question 1. It is one of the practical questions from the 2017 Neco Model Questions Vol1 Chemistry examination.
The question covers Atomic Structure, Stoichiometry, Gas Laws .
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