Answer:
(a) Homogeneous. 4.7 g of MgCl₂.
(b) 9.1 g
Explanation:
(a)
At 200°C, we can dissolve 54.6g of MgCl₂ in 100 g of water. The mass that we could dissolve in 38.2 g of water is:
Since we can dissolve up to 20.9 g of MgCl₂ and we added only 16.2 g, the mixture is homogeneous and we could add 20.9 g -16.2 g = 4.7 g of solute to make it saturated.
(b)
At 800°C, we can dissolve 66.1 g of MgCl₂ in 100 g of water. The mass that we could dissolve in 38.2 g of water is:
Since we can dissolve up to 25.3 g of MgCl₂ and we added only 16.2 g, we could add 25.3 g - 16.2 g = 9.1 g of solute to make it saturated.
The temperature changes by <span>#-173 ^(o) C#</span>
Answer:
E cell = +1.95 V
Explanation:
At Anode : Oxidation reaction takes place
At Cathode : Reduction reaction takes place
The reaction with lower value of reduction potential will undergo Oxidation
E = -1.18 V
This equation undergo oxidation reaction and become:
Anode(Oxidation-Half) :
E = +1.18 V
Cathode(Reduction-Half) :
E =+0.77 V
To balance the reaction multiply reduction-Half with 2.We get :
Note that E is intensive property , do not multiply E of oxidation-half with 2
Ecell = 0.77 -(-1.18)
E = +1.95 V
Answer:
The answer to your question is 0.92 atm
Explanation:
Data
Atmospheric pressure = 27.6 inHg
Atmospheric pressure = ? atm
Process
1.- Convert inHg to cmHg
1 in Hg ------------------- 2.54 cm
27.6 inHg ----------------- x
x = (27.6x 2.54) / 1
x = 70.1 cm
2.- Convert cmHg to mmHg
2.54 cm ----------------- 25.4 mmHg
70.1 cm ---------------- x
x = (70.1 x 25.4)/2.54
x = 701 mmHg
3.- Convert mmHg to atm
760 mmHg ------------- 1 atm
701 mmHg ------------- x
x = (701 x 1)/760
x = 0.922 atm
