B. It always has a concentration above 1.0 M
Answer : Phenolphalien turn pink in the presence of a base.
Phenolphthalien : It is an indicator which is used in the acid-base titration.
In acidic medium, the phenolphthalien is colorless and the pH will be less than 7.
In basic medium, the phenolphthalien is pink in color and the pH will be greater than 7.
Phenolphthalien is slightly soluble in the water and highly soluble in alcohols.
Hence, the phenolphalien turn pink in the presence of a base.
If it isn't using energy, it's called diffusion
Answer:
The answer to your question is 1 M
Explanation:
Data
Molarity = ?
mass of CaCl₂ = 222.2 g
Volume = 2 l
Process
1.- Calculate the molar mass of CaCl₂
CaCl₂ = 40 + (35.5 x 2) = 40 + 71 = 111 g
2.- Calculate the moles of CaCl₂
111g of CaCl₂ ---------------- 1 mol
222.2 f of CaCl₂ ---------------- x
x = (222.2 x 1) / 111
x = 222.2 / 111
x = 2 moles
3.- Calculate the Molarity
Molarity = moles / Volume
-Substitution
Molarity = 2/2
-Result
Molarity = 1
For the purpose, we will use the equation for determining the dissociation constant from concentration and <span>percent of ionization:
Kd = c </span>× α²
α = √(Kd/c) × 100%
Kd = 6.0×10⁻⁷
c(HA) = 0.1M
α = √(6.0×10⁻⁷/0.1) × 100% = 0.23%
So, in the solution, the acid <span>percent of ionization will be just 0.23%.</span>
