(i) Volume of point Naon to reach equivalence. = 24.0mL
(ii) volume of Naon used to reach 50% T = 12.0mL
(iii) PKA of an unknown acid = 4.8
(iv) moles of acid reacted = moles of NaOH
man/molar mass = 0.269g/MW = Molarity x volume
0.269g/MW = 0.09560 mol/K x 24. 0×/K
MW = 0.269g/0.09560 mol x 24.0x
MW = 117.24g mol-1
(v) In matching the given table of molar masses. with obtained man matches with that, we get that it of hexanoic acid.
<u>unknown acid = hexanoic acid</u>
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Titration is used to determine the amount of a substance present by reacting it with a known amount of another substance. For example, the molar mass of an acid can be found by titrating it with a base solution of known concentration. Your unknown solid is an acid. This is dissolved in water and phenolphthalein indicator is added and titrated to the endpoint with standard NaOH solution. Unknown acids are monobasic. There is only one acidic hydrogen per molecule.
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A prediction is not based upon evidence or reliable tests. A prediction is a guess as to what will happen in the future. Forecasts for example are nothing more than prediction, as even with "meteorological evidence", nothing is ever truly sure when in regard to wheather.
So "A"
Answer: 18
Explanation:
18 because that is the max
There are many types of acid or bases. Based on the Arrhenius definition,
* An Arrhenius acid donates H⁺ in a solution (like HCl, HNO₃, H₂SO₄)* An Arrhenius base yield OH⁻ in a solution (like NaOH, KOH, Mg(OH)₂)
Other types of acids and bases are the Lewis acids/bases and the Bronsted-Lowry acids/bases.