Answer:
Double displacement reaction
Explanation:
The chemical reaction is as follows :
NaCl + Pb(NO3)2 → PbCl + NaNO3.
Balanced equation:
Pb(NO3)2 + 2NaCl → PbCl2 + 2NaNO3
The reaction is a double displacement reaction . A double displacement reaction is a chemical reaction between compound where the cations and the anions of the 2 reactants exchange places to form a new product.
Double displacement reaction, the 2 reactants exchange ions to form new compounds. Double displacement reaction usually produce a solid precipitate. A good illustration of a double displacement reaction is
AB + CD → AD + CB.
From the reaction above the Sodium ion replace lead to from sodium nitrate while lead replace sodium to form the precipitate lead chloride. The anions(negatively charged ions) also exchange position.
A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. ... A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups.
The question is incomplete. Complete question is
<span>In an aqueus solution, which substance yields hydrogen ions as the only positive ions in the solution? 1)NaH 2)HCOOH 3)LiOH 4) CH3CH2OH?
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Answer: Correct answer is option 2, HCOOH
Reason:
HCOOH is a formic acid. When mixed in water, it undergoes dissociation which can be represented as
HCOOH </span>↔ HCOO- + H+
The compound NaH, will generate hydride ion (H-), while LiOH is an ionic compound, hence when dissolved in water it generated OH- ions. The compound CH3CH2OH is named as ethyl alcohol. This compound donot dissociate in aqueous medium.
