PH is the potential of hydrogen, pH provides a measure of the concentration of hydrogen ion while pOH scale provides the concentration of OH- ions.
pH denotes the negative logarithm of concentration of hydrogen while pOH denotes the negative logarithm of the concentration OH- ions.
Therefore; in this case the pOH= -log (OH-)
= - log (10^-10)
= 10
If the pOH is 10 then the pH of the solution will be 4
Equation
CaCO3 ===> CaO + O2
Solution
If you start with this equation, then the balance numbers (molar ratios) are
- 1 for the CaCO3
- 1 for the CaO
- 1 for the O2
If you want 2.35 moles of CaO then you are going to have to start out with 2.35 moles of CaCO3
Answer 4.
N2 + 3H2 ---> 2NH3
The answer would be C. Movement of crustal plates.
