Advertisements
Advertisements
Question
Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Write the equation for each of the above metals which react with Water.
Advertisements
Solution
Na Sodium 2Na + 2H2O → 2NaOH + H2
Ca Calcium Ca + 2H2O → Ca[OH]2 + H2
Mg Magnesium
Fe Iron
\[\ce{Mg +\underset{\text{(Boiling water)}}{H2O} -> MgO + H2}\]
\[\ce{3Fe + 4H2O (steam)⇌ Fe3O4 + 4H2}\]
APPEARS IN
RELATED QUESTIONS
Indicate which of the following statement is true and which is false:
The reaction between hydrogen and nitrogen to form ammonia is reversible.
Write two physical properties of hydrogen.
Discuss the use of hydrogen as a fuel ?
Give the general group study of hydrogen with reference to
valence electrons
State the following pertaining to the physical properties of hydrogen: Colour & odour
Complete and balance the equation:
Conversion of hydrogen to -
Hydrogen chloride - H2 + Cl2 → ________
Complete and balance the equation:
Conversion of hydrogen to -
Ammonia - N2 + 3H2 ⇌ ______
Complete and balance the equation:
Hydrogen in metallurgy - reduction of
Iron [III] oxide - Fe2O3 + 3H2 → ________ + ______
Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]
State the use of hydrogen –
In hydrogenation of oil and coal
