What happens when?
(a) Aluminum reacts with dilute Sulphuric Acid.
(b) Sulphur trioxide is mixed with water.
(c) Magnesium oxide is mixed with water.
(d) Zinc reacts with dilute sulphuric acid
(e) Magnesium reacts with aqueous solution of copper sulphate
Answers
A) Aluminium metal dissolves readily in dilute sulphuric acid to form solutions containing the aquated Al(III) ion together with hydrogen gas, H2. The corresponding reactions with dilute hydrochloric acid also give the aquated Al(III) ion.
B) It reacts violently with water to form sulfuric acid with the release of heat. ... It can react with water to form sulfuric acid. SO3 is also called sulfuric oxide and sulfuric anhydride.
C) Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to remove moisture.
D) Reaction of Zinc with Dilute Sulphuric Acid
Zinc is more reactive than hydrogen and it displaces hydrogen from dilute acids. Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is evolved.
E) When magnesium is placed in copper sulfate solution a redox reaction occurs, causing copper metal to form on the magnesium and the deep blue colour of the solution pales.
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(1)
Pure Aluminum reacts with dilute Sulfuric acid to produce Aluminum Sulfate and release Hydrogen gas Al + H2SO4 -> Al2(SO4)3 + H2 Copper is below hydrogen in the reactivity series of metals, so it is unable to displace hydrogen from sulphuric acid. !
(2)
When SO3 is exposed to air, it rapidly takes up water and gives off white fumes. It can react with water to form sulfuric acid. SO3 is also called sulfuric oxide and sulfuric anhydride.
(3)
Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to remove moisture. ... While "magnesium oxide" normally refers to MgO, magnesium peroxide MgO2 is also known as a compound.
(4)
Reaction of zinc with acids
Zinc metal dissolves slowly in dilute sulphuric acid to form solutions containing the aquated Zn(II) ion together with hydrogen gas, H2. In practice, the Zn(II) is present as the complex ion [Zn(OH2)6]2+. Zn(s) + H2SO4(aq) → Zn2+(aq) + SO42-(aq) + H2(g)
(5)
When magnesium is placed in copper sulfate solution a redox reaction occurs, causing copper metal to form on the magnesium and the deep blue colour of the solution pales. ... For example, potassium is so reactive that it is found naturally as a compound rather than a pure metal.