Aqueous sodium sulfide reacts with aqueous copper(ii) nitrate to form aqueous sodium nitrate and solid copper(ii) sulfide. express your answer as a chemical equation. identify all of the phases in your answer.

The give reaction between sodium sulfide and copper nitrate to form sodium nitrate and copper sulfide is an example of double displacement reaction. In this reaction, one of the products is a solid and hence this is a precipitation reaction.

Word equation:  Sodium sulfide(aq) + Copper nitrate(aq)-->Sodium nitrate(aq)+Copper sulfide(aq)

Chemical equation:

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance