Interpretation:
All the reactions that represent the effect on the pH of a solution of salt and water are to be identified.
Concept introduction:
Salt is a strong electrolyte that dissociates completely when added to water.
When a salt contains an anion that comes from a weak acid, the anion recombines with water to produce a weak acid and hydroxide ions, and forms a basic solution. If a cation comes from a strong base, it does not recombine, and is present in the solution as a free ion, without having any effect on the pH of the solution.
The reaction of the salt
When a salt contains a cationthatcomes from a weak base, the cation recombines with water to produce a weak base and hydronium ions, and forms an acidic solution. If the anion comes from a strong acid, it does not recombine, and is present in the solution as a free ion, without having any effect on the pH of the solution.
The reaction of the salt that takes place is:
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