Answer:
Reaction of water with K₂O produce base.
Explanation:
Reaction of water with K₂O:
K₂O + H₂O → 2KOH
when potassium oxide react with water it produces potassium hydroxide which is base.
Reaction of water with carbondioxide:
When carbondioxide react with water it produces carbonic acid.
CO₂ + H₂O → H₂CO
Carbonic acid is a weak acid and dissociate to gives H⁺ ions. It is aslightly acidic solution and convert into hydrocarbonate ions.
H₂CO₃ → H⁺ + HCO⁻₃
HCO⁻₃ → H⁺ + CO₃⁻²
Reaction of water with NO₂:
3NO₂ + H₂O → 2HNO₃ + NO
Nitrogen dioxide react with water and produce nitric acid and nitrogen monoxide.
Reaction of water with SO₂:
SO₂ + H₂O → H₂SO₃
When sulfur dioxide react with water it gives sulfurous acid.
Answer:
The answer is B
Explanation:
3+ means there is 3 more protons than electrons.
So electron need 3 more (-ve) charge in order to have the same charge as proton to become neutral atom (no charge).
e + 3 = 8
e = 8 - 3
= 5
A change from physical change into chemical change not sure hope this helps