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Why is that when NaOH H2SO4 and phenophtalein in conical flask becomes hot after shaking during titration?
The reaction between NaOH and H2SO4 is highly exothermic, meaning it releases heat. When the solutions are mixed in the conical flask and shaken during titration, this reaction occurs and produces a significant amount of heat. Additionally, the presence of phenolphthalein might contribute to the sensation of heat as it can change color when exposed to heat or pH changes, indicating the progress of the reaction.
What is the balanced equation for SO3 plus H2O?
The balanced equation for the reaction between SO3 and H2O is: SO3 + H2O → H2SO4
What are the products formed from a reaction between hydrogen iodide and sulfuric acid?
The products formed from the reaction between hydrogen iodide and sulfuric acid are hydrogen sulfate (H2SO4) and iodine (I2).
Chemical equation for oxidation of butyl alcohol?
The oxidation of butyl alcohol (C4H9OH) to butanal (C4H9CHO) can be represented by the chemical equation: C4H9OH -> C4H9CHO + H2O. This reaction can be catalyzed by an oxidizing agent such as chromium (VI) oxide (CrO3) or potassium dichromate (K2Cr2O7) in the presence of sulfuric acid (H2SO4).
Is h2so4 a base acid or salt?
H2SO4 is a highly concentrated acid.
Why use h2so4 instead of hcl in titration of kmno4?
H2SO4 is typically used instead of HCl in the titration of KMnO4 because HCl can react with KMnO4 and form chlorine gas, which can interfere with the titration results. Additionally, H2SO4 provides the required acidic medium for the reaction to occur between KMnO4 and the analyte.
How do you calculate the moles of H2SO4 in a titration?
To calculate the moles of H2SO4 in a titration, you can use the formula: moles Molarity x Volume. First, determine the molarity of the H2SO4 solution. Then, measure the volume of the solution used in the titration. Multiply the molarity by the volume to find the moles of H2SO4.
Why you do not use H2SO4 in iodometric titration?
Using H2SO4 in iodometric titration can lead to the formation of H2O2, which interferes with the reaction. It can also oxidize iodide ions prematurely, affecting the accuracy of the titration. Therefore, a different acid like HCl is typically used in iodometric titration.
Which indicator is used in titration of naoh and h2so4?
Phenolphthalein is commonly used as an indicator in the titration of NaOH and H2SO4. It changes color from colorless to pink as the solution reaches a specific pH range, signaling the endpoint of the titration.
Why is it necessary to acidify iron with h2so4 during redox titration?
Acidifying iron with H2SO4 during redox titration helps in preventing the hydrolysis of iron(III) ions, which can form insoluble hydroxides and interfere with the titration results. The acid medium also helps to ensure that the redox reaction between the iron and the titrant is carried out effectively and selectively.
Why H2SO4 is added in K2Cr2O7 during oxidation of alcohol?
H2SO4 is added in the oxidation of alcohols with K2Cr2O7 as a catalyst to provide acidic conditions, which facilitate the oxidation reaction. The sulfuric acid protonates the alcohol to form an oxonium ion, which is more easily oxidized by the chromate ion in K2Cr2O7. This helps to increase the efficiency and speed of the oxidation process.
Why do you add H2SO4 instead of HCL in redox titration?
H2SO4 is preferred over HCl in redox titrations because HCl can release Cl2 gas during the reaction, which can interfere with the titration results. H2SO4 provides the necessary acidic conditions for the redox reaction without introducing additional complications.
What happens when a titration is done with Na2co3 in the biurrette and h2so4 in the flask?
When titrating Na2CO3 with H2SO4, the acid-base reaction that occurs is: Na2CO3 + H2SO4 → Na2SO4 + H2CO3 The carbonate ion (CO3^2-) in Na2CO3 reacts with the hydrogen ion (H+) in H2SO4 to form carbonic acid (H2CO3), which then decomposes into water (H2O) and carbon dioxide (CO2). The endpoint of the titration is reached when all the Na2CO3 has reacted with the H2SO4.
Equation between potassium dichromate and iron sulfate?
The reaction between potassium dichromate (K2Cr2O7) and iron(II) sulfate (FeSO4) results in a double displacement reaction producing iron(III) chromate (Fe2(CrO4)3) and potassium sulfate (K2SO4). The balanced equation is: 3FeSO4 + K2Cr2O7 → Fe2(CrO4)3 + K2SO4.
What are the coefficients in K2Cr2O7 H2SO4 C2H5OH --- Cr2SO43 K2SO4 CH3COOH H2O?
2K2Cr2O7 + 2H2SO4 + 3C2H5OH ---> 2Cr2(SO4)3 + 2K2SO4 + 3CH3COOH + 11H2O.
What is the oxidation equation of the reaction of propanal with potassium dichromate?
The oxidation of propanal (CH3CH2CHO) by potassium dichromate (K2Cr2O7) in acidic conditions produces propanoic acid (CH3CH2COOH). The oxidation equation is: CH3CH2CHO + K2Cr2O7 + H2SO4 → CH3CH2COOH + Cr2(SO4)3 + K2SO4 + H2O.
How do you standardize 1N H2SO4 with a KHP?
To standardize 1N H2SO4 with KHP, you would first prepare a solution of KHP of known concentration. Then, titrate the KHP solution with the 1N H2SO4 solution until the endpoint is reached. The volume of H2SO4 used in the titration can then be used to calculate the exact concentration of the H2SO4 solution.
