Chemistry
Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: Iron, sodium, magnesium, zinc, calcium.
Related Questions
Hydrogen may be prepared in the laboratory by the action of a metal with an acid.
(a) Which of the metals copper, zinc, magnesium or sodium would be the most suitable?
(b) Which of the acids dilute sulphuric, concentrated sulphuric, dilute nitric and concentrated nitric would you choose? Explain why you would not use the acids you rejected.
(c) How would you modify your apparatus to collect dry hydrogen? Which drying agent would you employ for this purpose?
Why are the following metals not used in the lab. preparation of hydrogen?
(a) calcium
(b) iron
(c) aluminium
(d) sodium
Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing happens in the case of mercury and silver. Explain.
Steam can react with a metal and a non-metal to liberate hydrogen. Give the necessary conditions and equations for the same.