Water molecule in chemical formulas of inorganic compounds

In summary, when calculating the molar mass of inorganic compounds, it is important to remember that some compounds may contain molecules of water. While it is necessary to remember the formula for compounds like copper sulfate, which is commonly used as a hydrate, it is not necessary to remember all forms for compounds like calcium chloride. However, it is important to consider the presence of water when calculating the molar mass.
  • #1
gracy
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In chemical formulas of various inorganic compounds there are molecules of water .I wanted to know is it important to remember the number of moles of water in chemical formulas of inorganic compounds.
 
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  • #2
Depends. Some compounds - like copper sulfate - are so often used used as hydrates, that remembering their formula is a must (pentahydrate for copper sulfate). Other compounds can exist in many forms (calcium chloride can be prepared as dihydrate, tetrahydrate and hexahydrate) and remembering them all is not necessary.
 
  • #3
What is certainly important is to remember that there may be water around when calculating the molar mass.
 
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Likes gracy and Borek
  • #4
Pretty good point.
 
  • #5
DrDu said:
What is certainly important is to remember that there may be water around when calculating the molar mass.
You mean to say that we include number of moles of water while calculating molar mass of compounds,right?
 
  • #6
Yes. Say, you need 1 mole of copper and you have copper sulfate pentahydrate. What mass of the solid do you need?
 

1. What is the chemical formula for a water molecule?

The chemical formula for a water molecule is H2O, which represents two hydrogen atoms bonded to one oxygen atom.

2. How does the structure of a water molecule contribute to its properties?

The unique structure of a water molecule, with polar covalent bonds and a bent shape, allows it to form hydrogen bonds and give water its high boiling point, surface tension, and ability to dissolve many substances.

3. What is the role of water in inorganic compounds?

Water is often included in the chemical formulas of inorganic compounds as a reactant, product, or solvent. It can also act as a ligand, binding to metal ions in coordination compounds.

4. How does the presence of water affect the properties of inorganic compounds?

Water can affect the solubility, acidity/basicity, and reactivity of inorganic compounds. It can also participate in chemical reactions, such as hydrolysis or dehydration, which can alter the properties of the compound.

5. How is water involved in the naming of inorganic compounds?

Water molecules are often included in the names of inorganic compounds to indicate the presence of water in the compound. For example, hydrated compounds have a specific number of water molecules per formula unit, such as CuSO4·5H2O for copper(II) sulfate pentahydrate.

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