a) Magnesium forms___on reaction with oxygen
b) Potassium forms___ and__ on reaction with water
c) Magnesium shows no reaction with____water.
d)____gas is released when a metal reacts with an acid.
e) Iron displaces____from copper sulphate solution because_____is more reactive than______
Answers
Answer:
1) When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide, which is a compound. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium come together in a chemical reaction to form this compound.
2) Potassium undergoes a a reaction with water similar to that of sodium; the products of the reaction are potassium hydroxide and hydrogen gas. This reaction releases a great deal of heat energy, often igniting the hydrogen gas that is produced.
3) Magnesium does not react with water to any significant extent. ... Magnesium metal does however react with steam to give magnesium oxide (MgO) (or magnesium hydroxide, Mg(OH)2, with excess steam) and hydrogen gas (H2).
4) Metals readily react with acid and produce hydrogen gas which burns with a pop sound. Metals are placed above hydrogen in reactivity series and displace it during a reaction with an acid. As acids have a property of giving H+ ions. A resultant is formed with release of hydrogen gas.
5) Iron displaces copper ions from an aqueous solution of copper sulphate. It is a single displacement reaction of one metal by another metal. ... In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).
Answer:
a) Magnesium oxide.
b)KOH and H2.
c)Cold.
d) Hydrogen gas.
e)Copper,iron,copper.