Which of these ions may be precipitated as sulfides? Assume neutral aqueous solution, pH=7.

Silver (I) ion
Sodium ion
Calcium ion
Lead (II) ion
Manganese (II) ion
Ammonium ion

I think the silver I ion, lead II ion, and manganese ion may be precipitated as sulfides, but I'm not sure.

answered below.

To determine which of these ions may be precipitated as sulfides, we need to consider the solubility rules for sulfides. Here's how we can do it:

Step 1: Start by writing the balanced chemical equation for the reaction between the cation and sulfide ions to form the sulfide precipitate.

For example, let's take the reaction between silver (I) ion (Ag+) and sulfide ion (S2-):

Ag+ + S2- → Ag2S

Step 2: Check the solubility rules to see if the resulting compound Ag2S is insoluble or slightly soluble in water.

According to the solubility rules, most sulfides are insoluble, except for those of ammonium (NH4+) and alkali metals (Group 1) such as sodium (Na+). Therefore, Ag2S is insoluble.

Step 3: Repeat the above steps for the remaining ions.

For sodium ion (Na+), the reaction would be:

Na+ + S2- → Na2S

According to the solubility rules, sulfides of alkali metals such as sodium (Na+) are soluble. Therefore, Na2S is soluble, and sodium ion does not precipitate as sulfide.

For calcium ion (Ca2+), the reaction would be:

Ca2+ + S2- → CaS

According to the solubility rules, most sulfides are insoluble, except for those of ammonium (NH4+) and alkali metals (Group 1). Therefore, CaS is insoluble.

For lead (II) ion (Pb2+), the reaction would be:

Pb2+ + S2- → PbS

According to the solubility rules, sulfides of many metals, including lead (Pb2+), are insoluble. Therefore, PbS is insoluble.

For manganese (II) ion (Mn2+), the reaction would be:

Mn2+ + S2- → MnS

According to the solubility rules, most sulfides are insoluble, except for those of ammonium (NH4+) and alkali metals (Group 1). Therefore, MnS is insoluble.

For ammonium ion (NH4+), the reaction would be:

NH4+ + S2- → (NH4)2S

According to the solubility rules, sulfides of ammonium (NH4+) are soluble. Therefore, (NH4)2S is soluble, and ammonium ion does not precipitate as sulfide.

Based on the solubility rules, the ions that may be precipitated as sulfides are silver (I) ion (Ag+), lead (II) ion (Pb2+), and manganese (II) ion (Mn2+). The sodium ion (Na+), calcium ion (Ca2+), and ammonium ion (NH4+) do not precipitate as sulfides.