Which of the following substances are insoluble in water?

Question

1) sodium chloride
2) silver nitrate
3) potassium sulfate
4) copper(II) hydroxide

Avery Adams · Accepted Answer

That would be copper (II) hydroxide, or #Cu(OH)_2#.

You will need to become familiar with the solubility rules, because that will help you determine what compounds are soluble and what compounds are insoluble in water.

Here's what these rules look like

So, start with #NaCl#, or sodium chloride. The solubility rules tell you that all halides are soluble with the exception of those formed with siver, mercury, and lead ions. Since this is not the case here, sodium chloride will be soluble.

SIlver nitrate, or #AgNO_3#, is soluble because all nitrates are soluble, without exception. Potassium sulfate, or #K_2SO_4#, si soluble because all sulfates are soluble with the exception of those formed with silver, calcium, barium, mercury, lead, and strontium ions,

FInally, copper (II) hydroxyde, or #Cu(OH)_2#, is insoluble because all hydroxides are insoluble with the exception of those formed with alkali metal ions and barium.

Here's a link to an interactive version of the solubility rules:

https://tutor.hix.ai

Cooper Adams · Answer

undefined Substances that are insoluble in water include:
- Nonpolar compounds such as oils and fats
- Some metal oxides and hydroxides
- Some salts with low solubility constants, like silver chloride, lead(II) sulfate, and calcium sulfate

Which of the following substances are insoluble in water?

1) sodium chloride 2) silver nitrate 3) potassium sulfate 4) copper(II) hydroxide

1) sodium chloride
2) silver nitrate
3) potassium sulfate
4) copper(II) hydroxide