Solubility of Lead(II) Sulfide

The video tutorial discusses the solubility of lead(II) sulfide (PbS) in water. It explains that PbS is generally insoluble, supported by solubility rules and a solubility chart. The video clarifies that while a very small amount of PbS may dissolve, it is largely insoluble. The tutorial is presented by Dr. B, who provides a link to a full solubility table for further reference.

What is the chemical formula for lead(II) sulfide?

• PbS

• PbSO4

• Pb2S

• Pb2SO4

Why is lead(II) sulfide referred to as such?

• Because lead has a +3 charge and sulfur has a -3 charge

• Because lead has a +4 charge and sulfur has a -4 charge

• Because lead has a +1 charge and sulfur has a -1 charge

• Because lead has a +2 charge and sulfur has a -2 charge

Which of the following is NOT a common exception to the insolubility of metal sulfides?

• Potassium sulfide

• Sodium sulfide

• Ammonium sulfide

• Calcium sulfide

According to the solubility rules, what is the general solubility of metal sulfides?

• Always insoluble

• Always soluble

• Insoluble with some exceptions

• Soluble with no exceptions

What does the 'I' stand for in the solubility chart when referring to PbS?

• Indeterminate

• Inconclusive

• Intermediate

• Insoluble

What is the purpose of using a solubility chart in this context?

• To confirm the solubility of PbS

• To calculate the molecular weight of PbS

• To find the melting point of PbS

• To determine the density of PbS

What is the solubility status of lead(II) sulfide in water?

• Completely soluble

• Highly soluble

• Insoluble

• Slightly soluble

What is a key takeaway about the solubility of PbS in water?

• It dissolves completely

• It forms a precipitate immediately

• It is mostly insoluble with minimal solubility

• It is highly reactive with water

Who is the presenter discussing the solubility of PbS?

• Dr. A

• Dr. B

• Dr. C

• Dr. D