A chemist dissolves silver nitrate (AgNO3) in water. He also dissolves ammonium chloride (NH4Cl) in water. He mixes the two solutions. A precipitate of silver chloride (AgCl) forms. Which chemical equation correctly represents this reaction

The balanced reaction is:

AgNO₃ (aq) + NH₄Cl(aq)  →  AgCl(s) ↓ + NH₄NO₃ (aq)

Explanation:

1 mol of silver nitrate reacts with 1 mol of amonium chloride to produce 1 mol of silver chloride and 1 mol of amonium nitrate

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

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.