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It is not mandatory; acids are also titrated.
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∙ 7y ago
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What to use to remove rust off metal?
Rusting of an iron is an oxidation process. In acid medium iron undergoes corrosion rapidly when compared to basic medium. Because in acid medium hydrogen gas is formed, so oxidation (rusting) of iron is faster. But if concentrated base is present, then also corrosion rate is increased when compared to neutral or aqueous medium.
What is the oxidation state of Calcium-?
The oxidation states of calcium are +2, +1. It is considered to be a strongly basic oxide.
What is the basic formula for glucose oxidation?
6o2 + c6h12o6 ---> 6co2 + 6h2o
What is the action of sodium hydroxide on the colour of phenolphthalein?
Phenolphthalein is pink in basic solutions.Phenolphthalein is used as an indicator in volumetry - acid-base titration.
What is vanadium trioxide?
It is a compound in the form V2O3 with vanadium of an oxidation state of (III). It is derived from reduction of vanadium pentoxide V2O5. It is mostly used as a catalyst of various reactions. Personally I've produced it by reducing vanadium pentoxide in sulfuric acid, heating for 30mins then creating a basic solution using sodium carbonate.
What is the basic principle of biamperometric titration?
Basic principle of biamperometric titration is reduction-oxidation reaction which can produce electricity read by amperometer
Why the oxidation reduction titration must be in acidic medium?
Hydrogen ion (acid) has extra electrons which can be donated so the reaction can take place, whereas oxygen can accept those ions to form water in the product. That's why redox reactions always start of in a acidic solution and end up in a neutral/basic solution.
Why is an acidic titration medium a requirement of the vol hard?
volhard method uses Fe indicator. in the basic solution, Fe ion can precipitate forming Fe(OH)3 ...ete..
give the mechanism of Benedict solution?
It is a basic oxidation/reduction reaction whereby the reducing end of a reducing sugar reduces the oxidation state of an ion (typically metal ion such as Cu2+) to a lower state such as Cu+. This new oxidation state of copper is not soluable and will precipitate to the bottom of the solution. The color of the precipitate can also be an indicator of the concentration of the sugars.
What is the indicator in titration reactions that turns pink in basic solutions?
phenolphthalein
Why phenolphthalein get colour on basic medium?
In a basic medium phenolphthalein changes color frompink to colorless.
What to use to remove rust off metal?
Rusting of an iron is an oxidation process. In acid medium iron undergoes corrosion rapidly when compared to basic medium. Because in acid medium hydrogen gas is formed, so oxidation (rusting) of iron is faster. But if concentrated base is present, then also corrosion rate is increased when compared to neutral or aqueous medium.
Why do we add dilute sulphuric acid to dissolve mohr's salt?
For preparation of standard solution of Mohr salt {FeSO4.(NH4)2SO4.6H2O}, it's necessary to add dilute H2SO4 to prevent the Fe2+ ions of Mohr salt solution from undergoing oxidation (to Fe3+). Just try to prepare the standard solution without adding this acid. You'll observe that your "Mohr solution" will become yellow in colour, i.e., it won't remain "Mohr salt solution" anymore, hence can't be used in titration. And while doing the titration of the Mohr salt solution with KMnO4 (or even with K2Cr2O7), you need to add dilute H2SO4. The reason is well explained by the chemical equation involved: reduction: (MnO4)- + 8H+ + 5e ----> Mn2+ + 4H2O oxidation: Fe2+ ----> Fe3+ + e net equation: (MnO4)- + 8H+ + 5Fe2+ ----> Mn2+ + 4H2O + 5Fe3+ There is involvement of H+ ions in this reaction. This redox titration requires acidic medium. Moreover, KMnO4 acts as a very good oxidizing agent in the presence of acidic medium, than in the basic and neutral medium. NOTE: Now a query may arise that for providing acidic medium, can HCl or HNO3 be used? (Let me tell you it's one of the favourite questions of external examiners) The answer is NO, because HNO3 is a very strong oxidizing agent. So, the Fe2+ present will be oxidized both by KMnO4 and HNO3, which will result in an error in determination of volume of KMnO4 reacting with Mohr salt solution. Also, HCl can't be used because Cl- from HCl will be oxidized by KMnO4: HCl (aq) ---> H+ (aq) +Cl- (aq) oxidation by KMnO4=> 2Cl- ----> Cl2 + 2e So, some extra KMnO4 will be used up because it will oxidize both- Cl- as well as Fe2+, => error in titration.
What is the oxidation state of Calcium-?
The oxidation states of calcium are +2, +1. It is considered to be a strongly basic oxide.
What is terbium oxidation number?
4, 3, 2, 1 (weakly basic oxide) Maximum Oxidation number: 4 Minimum Oxidation number: 0
What is the oxidation number of lithium metal?
Oxidation number of Li is +1. Oxidation number of oxygen is -2.
What is the ratio of equivalent weight of kmno4 in acidic and basic and neutral medium?
determine the eqoivalent weight of KMno4 in basic medium
