Answer:
Chemical formula is CoCl. 3H₂O
Explanation:
Data Given
Percentage of water = 45.43%
Percentage of CoCl. = 54.57%
Chemical Formula of the hydrates = ?
Solution:
First, find the mass of each of the part ( CoCl and water) in 100 g of the Compound.
Mass of CoCl = 28 + 35.5
Mass of CoCl = 63.5
Mass of H₂O = 18 g
Now find how many moles are there for each element in 100 g of compound
So,
The percentage will be count in grams for 100g in compound
Find the moles in total compounds
Formula Used for CoCl
mole of CoCl = mass of CoCl / Molar mass of CoCl
mole of CoCl = mole of 54.57 g / 63.5 g/mol
mole of CoCl = 0.859
Formula Used for H₂O
mole of H₂O = mass of H₂O/ Molar mass ofH₂O
mole of H₂O = 45.43 g / 18 g/mol
mole of H₂O = 2.539
Now
To find the Chemical formula
Divide each one by the smallest number of moles
CoCl = 0.859 / 0.859
CoCl = 1
For H₂O
H₂O = 2.539 / 0.859
H₂O = 3
Multiply the mole fraction to a number to get the whole number.
CoCl = 1
H₂O = 3
So,
The Chemical formula is CoCl. 3H₂O
Answer:

Explanation:
The reaction is a precipitation reaction. In other words, the two aqueous solutions react to give the solid salt, potassium chloride (KCl) in this case.

Because the reaction product is a solid, the net ionic equation can be written as:

This is the resultant equation after removing spectator ions: sulfate and strontium.
Your experimental value would not be accurate
Answer:
= 49.674 g NaCl
Explanation:
From the equation;
1 mole of Sodium metal produces 2 moles sodium chloride
This means;
23 g of Na will produce 116.88 g of NaCl
Therefore;
11.5 g will generate;
= (11.5 × 116.88)/23
= 58.44 g of NaCl
But;
Percentage yield = (Actual yield/Theoretical yield)× 100%
85 /100 = Actual yield /58.44 g
Thus;
Actual yield = 0.85 × 58.44
= 49.674 g NaCl
Answer:
1s2 2s2 2p6 3s2 3p6
Explanation:
Chlorine is a groups 17 element. The halogens for ions by accepting one electron to form univalent negative ions.
Since chlorine normally contains seventeen electrons, the chloride ion consists of eighteen electrons.
Hence the electronic configuration of chlorine ion is; 1s2 2s2 2p6 3s2 3p6.