Which one in FALSE regarding titrations The end point defined as the point where

Question

Which one in FALSE regarding titrations The end point defined as the point where the indicator changes color. The want is the solution for which you already know the concentration. The analyte the solution you are analyzing - to try to find its concentration Acid-base reactions are also neutralization reactions. The equivalence point is defined as the point where the indicator changes colour when the strong base KOH and the weak acid HF react which of these will NOT be in the net ionic equation OH(aq) K^+(aq) H_2O(l) F^-(aq) HF(aq) A 10,000 mL sample of vinegar (acetic acid in water), is titrated with 0.5062 M NaOH, and 16.58 mL, is required to reach the endpoint. What is the molarity of the acetic cacid in vinegar?(you can treat vinegar like strong acid in this case.) Regarding the compound SF_6 (formed by the redox reaction of S = F_2): It is more dense than air. An aluminum boat can float on it Breathing it will make your voice go low Fluorine added to sulfur will cause a flame All of the above are true

Explanation / Answer

21 ) Tha false statement is

equivalence point is defined as the point where indicator changes colour

The correct statement is

Equivalence point is defined as the point where the number of equivalents of titrant becomes equal to titrate.

22) When acid reacts with base it results in formation of salt and water

So the reaction will be

K+ + OH- + HF --> H2O + K+ + F-

So net equation will be

HF + OH- --> F- + H2O

so the species not present will be K+ (spectator ion)

3) The reaction will be

CH3COOH + NaOH --> CH3COO-Na+ + H2O

As per the equation at equivalence point the moles of acid = moles of base

Moles = Molarity X volume

Molarity of acid X volume of acid = Molarity of base X volume of base

Molarity of acid X 10 = 0.5062 X 16.58

Molarity of acid = 0.839 M

4) a) It is almost 6 times denser than air

b) Yes it is so dense that aluminum boat can float over it

c) it inhaled it replaces the oxygen in the respiratory tract and may cause suffocation

d) It produces high amount of heat

So all are correct

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