From the calculation, the molar mass of the solution is 141 g/mol.
<h3>What is the molar mass?</h3>
We know that;
ΔT = K m i
K = the freezing constant
m = molality of the solution
i = the Van't Hoft factor
The molality of the solution is obtained from;
m = ΔT/K i
m = 3.89/5.12 * 1
m = 0.76 m
Now;
0.76 = 26.7 /MM/0.250
0.76 = 26.7 /0.250MM
0.76 * 0.250MM = 26.7
MM= 26.7/0.76 * 0.250
MM = 141 g/mol
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Answer:
pH = - log [concentration]
pH = - log (0.0043M)
pH = 2.37
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When we take a look at the periodic table of elements we can see that Fluoride has the atomic number of 9. What this means is that this atom has 9 protons and 9 electrons. Since the fluorine ion has a negative charge of one, that means that the fluorine ion has one more electron than the fluorine atom.
So, the F- ion has 9 protons and 10 electrons.