0.2 mole of hydrated salt was heated 0.10 mole of water was lost what is molecular formula of hydrated salt
To determine the molecular formula of the hydrated salt, we need to calculate the molar ratio between the anhydrous salt and water.
Given:
- 0.2 moles of hydrated salt
- 0.10 moles of water lost
We can calculate the molar ratio by dividing the moles of water lost by the moles of hydrated salt:
Molar Ratio = Moles of Water Lost / Moles of Hydrated Salt
Molar Ratio = 0.10 moles / 0.2 moles
Molar Ratio = 0.5
Now, we need to find a whole number ratio by multiplying both the moles of water and the moles of hydrated salt by the same number to get a whole number ratio. In this case, we will multiply by 2:
Molar Ratio = 0.5 * 2
Molar Ratio = 1
The resulting molar ratio is 1, which means the molecular formula of the hydrated salt is 1:1. In other words, there is one water molecule associated with each molecule of the anhydrous salt.
Therefore, the molecular formula of the hydrated salt is written as:
Anhydrous Salt : Water
1 : 1
To find the molecular formula of the hydrated salt, you need to know the molar mass of the hydrated salt and the molar mass of water.
1. Find the molar mass of water (H2O).
- The molar mass of hydrogen (H) is approximately 1 gram/mol.
- The molar mass of oxygen (O) is approximately 16 grams/mol.
- Since water has 2 hydrogen atoms and 1 oxygen atom, the molar mass of water is calculated as follows:
Mass of water = (2 * molar mass of hydrogen) + (1 * molar mass of oxygen)
= (2 * 1 g/mol) + (1 * 16 g/mol)
= 2 g/mol + 16 g/mol
= 18 g/mol
2. Convert the amount of water lost to grams.
- Given that 0.10 mole of water was lost, multiply this by the molar mass of water to obtain the mass:
Mass of lost water = moles of water lost * molar mass of water
= (0.10 mol) * (18 g/mol)
= 1.8 grams
3. Calculate the molar mass of the hydrated salt.
- Subtract the mass of lost water from the original mass of the hydrated salt to determine the mass of the anhydrous salt (the salt without water).
- Divide the molar mass of the anhydrous salt by the mass of a mole of anhydrous salt to find the number of moles of anhydrous salt.
- Divide the number of moles of anhydrous salt by the number of moles of water lost to obtain the ratio of moles of anhydrous salt to moles of water.
- Multiply the ratio by the molar mass of the anhydrous salt to calculate the molar mass of the hydrated salt.
4. Determine the empirical formula of the hydrated salt.
- The empirical formula represents the simplest whole number ratio of elements in a compound.
- Divide the molar mass of the hydrated salt by the molar mass of the empirical formula to determine the ratio.
- Use this ratio to write the empirical formula.
5. Determine the molecular formula of the hydrated salt.
- The molecular formula represents the actual number of atoms of each element in a compound.
- Find the molar mass of the empirical formula.
- Divide the molar mass of the hydrated salt by the molar mass of the empirical formula to determine the ratio.
- Use this ratio to write the molecular formula.
Once you have all the required information and perform the calculations, you will be able to find the molecular formula of the hydrated salt.
Do you have any more data?
Do you have a particular salt in mind or do you want the answer to be some thing like xy.zH2O where xy is the salt and z is the number of H2L per one mol xy?