Below are the formulas of some hydrates. what is the mole ratio of salt to water?
Hydrate
Na2SO4.10H2O
Co(NO3)2.6H2O
Mo(NO3)2.5H2O
CaSO4.2H2O
(CaSO4)2.H2)
Thankk you
a. 1:10
b.1:6
c1:5
d1:2
e1:2
There must be something about this that you don't understand. Tell me what it is and let's get these pesky problems out of the way. I did the mole ratio for ZnSO4.7H2O and told you it was 1 mole salt to 7 moles H2O, which follows from the formula (ZnSO4)1.7H2O. It's just a matter of looking at the formula and writing down the answer unless there is some hangup I don't know about.
not a
1:10
1:6
1:5
1:2
2:1 (due to the 2 beyond parenthesis)
To determine the mole ratio of salt to water in each hydrate, we need to consider the number of moles of salt and water in each compound.
The general formula for a hydrate is:
Salt.nH2O
For each hydrate, the mole ratio of salt to water is calculated by dividing the coefficient of the salt formula by the coefficient of the water formula.
1. For Na2SO4.10H2O:
The mole ratio is 2:10, which simplifies to 1:5.
2. For Co(NO3)2.6H2O:
The mole ratio is 1:6.
3. For Mo(NO3)2.5H2O:
The mole ratio is 1:5.
4. For CaSO4.2H2O:
The mole ratio is 1:2.
5. For (CaSO4)2.H2):
This compound does not contain water, so the mole ratio of salt to water is 2:0, which simplifies to 1:0.
To summarize the mole ratios:
Na2SO4.10H2O: 1:5
Co(NO3)2.6H2O: 1:6
Mo(NO3)2.5H2O: 1:5
CaSO4.2H2O: 1:2
(CaSO4)2.H2): 1:0 (no water)