When would a salt be formed?

Question

a. NaCl is combined with NaOH
b. H20 is combined with HCl
c. KOH is combined with HCl
d. HCl is combined with H20S04

Answer 1

In this kind of acid-base reaction, if H2O, precipitates (like AgCl), or gas (such as CO2, SO2, SO3) is formed, then there will be a salt formed.
So look at the ions from a. Combination of Na+, Cl-, and OH- will never give u any form of precipitation, gas, or H20. Nor would b or d. In c, mixture of K+, OH- and H+, Cl- will allow the formation of H20 from OH- and H+.
So C is the correct answer : )

Answer 2

c. You end up with aqueous potassium chloride (KCl)