Yes, you most certainly do. For example, CuSO4 has a molecular weight of 159.6g/mol, yet it's pentahydrate has a molecular weight of 249.684g/mol. If you didn't add in the pentahydrate. You'd have about 40% error in the molarity.
NaCl salt does not contain water of crystallization.
yes and my answer might not be correct
A soluble salt turns into the crystalline form, usually with its water of crystallisation
The molar mass of water (H2O) is 18. Ice is water in it's solid state.
1. Find the molar mass of the hydrate (Calcium Chloride Dihydrate).Find the molar mass of water and the anhydrate (anhydrate + water = hydrate); add the molar mass values of each to find the molar mass of the hydrate.Molar Mass CaCl2: 110.98g+ Molar Mass H2O: 36.04g*Molar Mass CaCl2 * 2H2O: 147.01gFinding Molar Mass# atoms element A * atomic mass element A = Mass A# atoms element B * atomic mass element B = Mass B... etc.Add up all the mass values and you have the value for molar mass. Do this for both the anhydrate and the water molecules. Add these values together to find the molar mass of the hydrate.Molar Mass Anhydrate + Molar Mass Water Molecules* = Molar Mass Hydrate* Tip: the molar mass of water for all hydrate calculations is 18.02g x number of water molecules. This number may be useful to remember on the day of the test or while doing practice problems.*2. Calculate the percentage of water in hydrate.Divide the molar mass of water by the molar mass of the hydrate, and multiply result by 100%.36.04g147.01g x 100%Percent water in hydrate is 24.52%.
You ca calculate the molar mass for an anhydrous compound or for the hydrated forms; it is your choice and depends on the available reagent.
H
Yes. There is no water of crystallisation.
Perform crystallisation.
The water of crystallization is a type of water contained in the molecular structure of a compound.
NaCl salt does not contain water of crystallization.
This can be done by heating the salt.
yes and my answer might not be correct
The molar mass of water is 18 g/mol.
CaCl2 , the anhydrous (no water of crystallisation) form. There are various hydrates.
de-watered crystals
No,it's a physical change Because there is no change in matter's composition.