which of these substances dissolve in water? and are they elements or compounds?
copper nitrate
sodium hydroxide
copper hydroxide
copper oxide
hydrochloric acid
aluminum
copper chloride
hydrochloric acid
Al is an element. The others are compounds. Consult this site for solubility.
http://www.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
To determine which substances dissolve in water and whether they are elements or compounds, we can refer to their chemical formulas and properties.
1. Copper nitrate (Cu(NO3)2):
Copper nitrate is a compound that dissolves in water. It contains copper (Cu), nitrogen (N), and oxygen (O). It dissociates into copper ions (Cu2+) and nitrate ions (NO3-) when dissolved in water.
2. Sodium hydroxide (NaOH):
Sodium hydroxide is a compound that dissolves readily in water. It is composed of sodium (Na), hydrogen (H), and oxygen (O). When dissolved in water, it dissociates into sodium ions (Na+) and hydroxide ions (OH-).
3. Copper hydroxide (Cu(OH)2):
Copper hydroxide is a compound that can dissolve in water. It consists of copper (Cu), hydrogen (H), and oxygen (O). When it comes into contact with water, it forms copper ions (Cu2+) and hydroxide ions (OH-).
4. Copper oxide (CuO):
Copper oxide is an insoluble compound that does not dissolve in water. It is composed of copper (Cu) and oxygen (O). It remains as solid particles when in contact with water.
5. Hydrochloric acid (HCl):
Hydrochloric acid is a compound that is highly soluble in water. It is composed of hydrogen (H) and chlorine (Cl). When mixed with water, it dissociates into hydrogen ions (H+) and chloride ions (Cl-).
6. Aluminum (Al):
Aluminum is an element that does not dissolve in water. It is a solid metal, and it does not dissociate or react significantly when in contact with water.
7. Copper chloride (CuCl2):
Copper chloride is a compound that dissolves easily in water. It contains copper (Cu) and chlorine (Cl). When dissolved in water, it forms copper ions (Cu2+) and chloride ions (Cl-).
To summarize:
- Substances that dissolve in water: copper nitrate, sodium hydroxide, copper hydroxide, hydrochloric acid, and copper chloride.
- Substances that do not dissolve in water: copper oxide and aluminum.
- Elements: aluminum.
- Compounds: copper nitrate, sodium hydroxide, copper hydroxide, copper oxide, hydrochloric acid, and copper chloride.