What is the process of dissociation? A. A solvent separates the individual molecules in a compound and carries them away, but leaves them chemically unchanged.
B. A solvent separates the atoms of a covalent molecule and carries them away, breaking the substance down into individual ions.
C. A solvent disrupts the lattice-like structure of an ionic compound, causing the ions to combine into a new compound.
D. A solvent disrupts the lattice-like structure of an ionic compound, breaking the compound into individual ions.

Option D. A solvent disrupts the lattice-like structure of an ionic compound, breaking the compound into individual ions.

Explanation:

Dissociation of compound simply involves the splitting of ionic compounds into the individual ions that make up the compound. This can be seen when an acid dissolves in water as illustrated below:

In this case we shall use H2SO4.

H2SO4(aq) <==> 2H^+ + SO4^2-

From the above illustration, we can see that the solvent (water) breaks the acid into the individual ions that makes up the acid.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g