18 Questions
Which of the following salts are exceptions and are insoluble?
Carbonates (CO3)2−
Based on the solubility rules, which of the following ions would NOT form a solid in a precipitation reaction?
NO3−
Which group of cations forms exceptions when it comes to the solubility of sulfides?
Group 2 cations
If all the ions in a reaction are soluble, what can be concluded?
No reaction occurs
Which of the following ions has a solubility product constant associated with it?
(CO3)2−
Among the given ions, which one is correctly identified as insoluble based on the solubility rules?
(PO4)3−
What is the purpose of using solubility product constant (Ksp) when comparing the solubilities of compounds?
To directly compare the relative solubilities of compounds that produce the same number of ions when dissolved
Why are the chlorides of Pb²⁺, Ag⁺, and Hg₂²⁺ grouped together in qualitative analysis?
Since they are all insoluble in water
Why are cations classified according to the solubility of their salts in water?
To predict the behavior of the cation in solution
What are separations in qualitative analysis of cations?
Procedures that separate groups of ions from other groups for further testing
Confirmatory tests in qualitative analysis of cations are used for:
Conclusively identifying the presence of certain ions
In qualitative analysis, why is the group reagent H₂S used for sulfides of Pb²⁺, Hg₂²⁺, Bi³⁺, Cu²⁺, and Cd²⁺?
Since these sulfides are insoluble in water
In a double replacement reaction, when is the reaction specifically classified as a precipitation reaction?
When one of the products formed is insoluble in aqueous solution
What role do solubility rules play in predicting whether a reaction forms a precipitate or not?
They provide guidelines on which ions form solids and which remain in their ionic form
Why are reactants considered soluble due to dissociation in an aqueous solution?
Because they are ionic compounds that dissociate into ions
Which of the following is a correct statement regarding the solubility rules?
If something is insoluble due to rule 1, it has precedence over a lower-numbered rule
What do the six solubility guidelines used to predict insoluble molecules in water help in forming?
Solid precipitates in solution
Why is a double replacement reaction sometimes referred to as a 'switching' reaction?
Because the reactants form new compounds by exchanging partners
Test your knowledge on the solubility rules for ionic compounds. Questions cover the solubility of acetates, nitrates, chlorides, sulfates, and insoluble compounds like carbonates and phosphates.
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