Bleach contains sodium chlorine and oxygen
When a mixture consists of a weak acid, such as HF, and its corresponding salt, NaF, this is an acid buffer. So, we can use the equation as written below:
pH = pKa + log(salt/acid)
For HF, the pKa = 3.17
Thus,
pH = 3.17 + log(0.12/0.26)
<em>pH = 2.83</em>
I guess it is A and i think i m correct
The mole ratio Aluminium to Aluminum Oxide is 2 : 1
<h3>Further explanation</h3>
Given
Reaction
2Al + Fe ----> Al2O3 +2Fe
Required
The mol ratio
Solution
If we look at the reaction above, there is an element missing from the reactant i.e oxygen, because the number of atoms and elements involved in the reaction should be the same between the reactants and products.
So the possible and balanced reactions are:
<em>2Al(s) + Fe₂O₃ (s) → Al₂O₃ (s)+ 2Fe (s) </em>
From this reaction the ratio of Al: Al₂O₃ can be determined, which is 2: 1
Diffusion if the movement of small molecules across the cell membrane.
Kinetic energy of the molecules results in random motion, causing diffusion.
