Answer:
4
10
Explanation:
The reaction equation is given as;
Ca(OH)₂ → Ca²⁺ + 2OH⁻
Concentration of Ca(OH)₂ = 5 x 10⁻⁵M
Unknown:
pOH of the solution = ?
pH of the solution = ?
Solution:
Solve for the pOH of this solution using the expression below obtained from the ionic product of water;
pOH = ⁻log₁₀[OH⁻]
Ca(OH)₂ → Ca²⁺ + 2OH⁻
1moldm⁻³ 1moldm⁻³ 2 x 1moldm⁻³
5 x 10⁻⁵moldm⁻³ 5 x 10⁻⁵moldm⁻³ 2( 5 x 10⁻⁵moldm⁻³ )
1 x 10⁻⁴moldm⁻³
Therefore;
pOH = -log₁₀ 1 x 10⁻⁴ = 4
Since
pOH + pH = 14
pH = 14 - 4 = 10
Answer:
P2=51223 torr
Explanation:
As given in the question that gas follows the ideality nature of gas
Lets assume that P1 V1 and T1 are the initial parameter of gas and
P2 V2 and T2 are the final parameter of gas
given value:
P1=710torr
V1=500ml
T1=30C=303K
P2=?
V2=25ml
T2=820C=1093K
So,
After putting all the value we get,
P2=51223 torr
Your right with chemical energy is stored in a piece of wood before its burned and then that it releases thermal energy whilst its being burned. It will also release sound energy but not nearly as much as thermal energy.