HCl and HNO3 are not used in the titration of Mohr’s salt in place of sulfuric acid because: HCl is a mild reducing agent and it reacts with some of the indicator that is KMnO4 solution so the final value of the indicator used come to be more than the actual value disturbing the experiment.
Why nitric acid is not used for acidification?
This is because nitric acid is a strong oxidising agent, and oxidises hydrogen gas to convert it into the water.
Why is nitric acid not used in permanganate titration?
Nitric acid is not used as it is itself an oxidising agent and hydrochloric acid is usually avoided because it reacts with KMnO4 according to the equation given below to produce chlorine and chlorine which is also an oxidising agent in the aqueous solution.
Why HCl and HNO3 Cannot be used instead of H2SO4?
Concentrated hydrochloric acid cannot replace Conc. Sulphuric acid for the preparation of nitric acid because hydrochloric acid is volatile acid and hence nitric acid vapors will carry HCl vapors.
Why nitric acid is not often used as a standard solution?
Standard solutions of nitric acid are seldom used because of their oxidizing properties. To obtain most standard acid solutions, a solution of an approximate concentration is first prepared by diluting the concentrated reagent. The diluted acid solution is then standardized against a primary-standard base.
Why is dilute h2so4 used in titration?
Sulfuric Acid is generally used for this purpose because Nitric Acid and Hydrochloric Acid can participate in competing oxidation-reduction reactions, reducing the accuracy of the titration.
Why is dilute sulphuric acid added?
By adding sulphuric acid the pH is lowered such that the concentration of OH−&HCO−3 is extremely low. The presence of these ions causes coprecipitation of copper hydroxide and copper carbonates which are much less soluble in water. Therefore, by addition of sulphuric acid we get pre crystals of CuSO4.
Why HCl is not used in permanganate titration instead of Sulphuric acid?
Hydrochloric acid (HCl) is usually not used in the process of titration because it reacts with the indicator potassium permanganate (KMnO4) that is used in the process. It reacts with KMnO4 solution and gets oxidized which further results in the liberation of chlorine gas.
Can we use dilute HCl instead of H2SO4?
All Answers (4) If they are dilute, yes. Otherwise, you will want to add cold H2SO4 very slowly to cold HCl, in a fume hood.
Why is nitric acid preferred for wet digestion?
Nitric acid is used because all nitrate salts are soluble in water. If we use H2SO4 or HCl they will produce sulphate or chloride salts. Some metal sulphates and chlorides are not very soluble in water.
What will happen if HCl is used instead of H2SO4 in titration?
H2SO4 increase the acidic content of the solution so as to prevent MnO4 (purple) to reduced to MnO2(dark brow). Hence sulfuric acid is stable in the present of strong oxidising agent. If HCl acid is use it will be oxidised to Cl and make the end point much higher.
What is the purpose of the nitric acid is it a reactant?
HNO3 is used as a strong oxidizing agent. It can be manufactured by the catalytic oxidation of ammonia. It is a common reagent used in laboratories and an important chemical used in industries to manufacture explosives and fertilizers. The PH of Nitric acid is approximately 3.01.
Can nitric acid be used as a standard solution?
Nitric acid, 1.0N Standardized Solution is used for volumetric analysis in laboratories.
Why is nitric acid an oxidizing agent?
In the case of Nitric acid (HNO3), the nitrogen has a +5 oxidation state, which is its highest oxidation state, so it will get reduced and oxidize other molecules. Hence it acts as an oxidizing agent.
What is the mixture of nitric acid and sulphuric acid called?
NITRATING ACID
NITRATING ACID, MIXTURE, (WITH
Why we add H2SO4 in iodometric titration?
The function of H2SO4 in Redox Titration is to get an acidic nature in the titration mixture. Explanation: here in this titration sulfuric acid H2SO4 is having the oxidation state of sulfur is +6,. This is the highest possible oxidation state of Sulphur which is found in its compounds.
Why KMnO4 is used in titration?
Potassium Permanganate is a flexible and potent oxidant which can be used by overt or indirect titration to classify many compounds. A special value of Potassium Permanganate is that it acts as an indicator of its own. Permanganate titration must be carried out in a heavy acid solution.
Why dilute sulphuric acid is more corrosive?
Dilute sulphuric acid contains more dissociated H+ ions as compared to concentrated sulphuric acid. So Dilute sulphuric acid is a stronger acid as compared to concentrated sulphuric acid.
Why is sulfuric acid added slowly?
To dilute the acid, the acid should be added slowly to cold water with constant stirring to limit the buildup of heat. Sulfuric acid reacts with water to form hydrates with distinct properties.
What is the name of dilute sulphuric acid?
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula H 2SO 4.
Sulfuric acid.
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Why KMnO4 Cannot be acidified using HCl?
KMnO4 is a very strong oxidizing agent and it can oxidize HCl to liberate chlorine gas, therefore HCl cannot be used to acidify potassium permanganate solution in volumetric analysis.
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