Answer : The number of moles of ions form are, and there are 3 ions formed.
Explanation :
First we have to calculate the moles of calcium iodide.
Molar mass of calcium iodide = 293.9 g/mol
Mass of calcium iodide = 51.0 g
Now we have to calculate the number of moles of ions.
As we know that when calcium iodide dissolved in water then it dissocites to give calcium ion and iodide ion.
The balanced chemical reaction will be:
From this we conclude that there are 3 ions formed.
As, 1 mole of calcium iodide dissociate to give number of ions
So, 0.174 mole of calcium iodide dissociate to give number of ions
Thus, the number of moles of ions form are,
First, we are going to use H-H equation :
when PH = Pka + ㏒ [acetate / acetic acid]
when we have Ka value = 1.8 x 10^-5 so, we can get the Pka value:
Pka = - ㏒Ka
= - ㏒ 1.8 x 10^-5
= 4.74
by substitution:
∴ 4.58 = 4.74 + ㏒[acetate / acetic acid]
∴acetate/acetic acid = 0.692
so we need moles of acetate = volume *molarity
= 0.5 L * 0.25 M
= 0.125 moles
when the acetate/ acetic acid ratio = 0.692 and moles acetate = 0.125 moles
∴ moles acetic acid = 0.125 moles / 0.692 moles = 0.182 moles
∴ volume use for 0.182 moles = 0.182 / 0.5 = 0.364 L
∴volume of buffer solution = 0.5 L + 0.364L
= 0.864 L
Answer:
Food or Sun
Explanation:
I'm not sure if it's food or sun, but try both
Answer:
petroleum,natural gas,lime stone, coal,water,acetylene etc.