A Sample Contains Ba₃(PO₄)₂, CdS, AgCl, NH₄Cl, and ZnS

question 30

Multiple Choice

A sample contains Ba₃(PO₄) ₂, CdS, AgCl, NH₄Cl, and ZnS. Identify the precipitate formed upon the addition of 6 mol L^-1 HCl.

• A) Ba₃(PO₄)₂
• B) CdS
• C) AgCl
• D) NH₄Cl
• E) ZnS

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Definitions:

Rescission

The act of canceling a contract, returning both parties to their pre-contractual situation.

Mutually Agree

A situation in which two or more parties come to a common understanding or consent on a matter.

Executed

indicates that an operation or task has been successfully carried out or implemented to its full extent.

Preexisting Duty Rule

A principle in contract law stating that performing or promising to perform a duty already owed under contract does not constitute valid consideration for a new promise.