Answer:
a. PbO.
Explanation:
- The formula unit of a stable chemical compound should maintain that the overall charge of the compound is zero <em>(not charged)</em>.
- The formula unit of a compound is represented by the lowest ratio numbers of the ions forming the compound.
<em>Choice a:</em> is the right answer PbO
- That lead is divalent cation Pb²⁺ and O is considered as a divalent anion O²⁻.
- So, the formula unit contains Pb:O with a ratio of 1:1 (PbO)
<em>Choice b: </em>is a wrong choice Li₂B
- The lithium cation is a monovalent cation Li¹⁺ and boron is a trivalent cation B³⁺, so we can not do that.
<em>Choice c:</em> is a wrong choice Al₂Pb₃
- that Al is a trivalent cation Al³⁺ and Pb is a divalent cation Pb²⁺, so we can not do this for the two cations.
<em>Choice d:</em> is a wrong choice ClO
- that Cl may act as Cl¹⁺ and O acts as O²⁻, so the right formula unit should be Cl₂O.
None of the given statements are completely true.
<u>Explanation</u>:
Family or groups in "periodic table" are 18 in number which represents column in table. As we go down in a family or group in the "periodic table"-the atom size become bigger and bigger. Non-Metals are less reactive which mostly lie in p-block. "Metals" are ""ore reactive" in "s-block". The atom’s valence electrons remain same for example when we go down in alkali metals in s-block the valence electron is one only and in alkaline earth metals its two only.
Based on the reactants and products,
- The molecular equation of the reaction is: Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3
- The complete ionic equation of the reaction is: Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+
- The net ionic equation of the reaction is:Al3+ 3OH- ---> Al(OH)3(s)
- The spectator ions are: Na+ and NO3+
<h3>What is a precipitate?</h3>
A precipitate is a solid product formed in when two solutions of salts react by double replacement.
The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3
The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+
The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
- Al3+ 3OH- ---> Al(OH)3(s)
- The spectator ions are: Na+ and NO3+
Learn more about ionic equation at: brainly.com/question/25604204