Redox Titration Of Kmno4 And Oxalic Acid

What weight of a sample of impure oxalic acid should be taken for titration by 0.5000 N sodium hydroxide so that the percentage of oxalic acid dehydrate will be twice the buret reading?

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1. What weight of a sample of impure oxalic acid should be taken for titration by 0.5000 N sodium hydroxide so that the percentage of oxalic acid dehydrate will be twice the buret reading?

Answer:

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2. a 1.000g sample of pure oxalic acid dihydrate, H2C2O4*2H2O, acts as a diprotic acid when titrated with 44.51ml of aqueous sodium hydroxide. Calculate the normality of the sodium hydrioxide solution.

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Answer:

I HOPE IT HELPS

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Explanation:

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3. A solution of kmno4 was prepared and 46.36 ml was used to completely titrate 0.3502 g of pure na2c2o4. what is the concentration of the kmno4 solution?

Answer:

0.141 M

Explanation:

[tex]\begin{matrix}

+1 & x & -2 \\

K & Mn & O_4

\end{matrix}

0=+1+x-2\times 4

x=+7[/tex]

[tex]MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{2+}+4H_2O[/tex]

[tex]C_2O_4^{2-} \rightarrow 2CO_2 +2e^-[/tex]

[tex]2MnO_4^- + 5C_2O_4^{2-}+ 16H^+ \rightarrow 2Mn^{2+} + 10CO_2 + 8H_2O[/tex]

[tex]M_1V_1=M_2V_2[/tex]

[tex]2M_1\times (0.04636 \ L) = 5 (0.3502 \ g \ Na_2C_2O_4 \times\frac{1\ mol \ Na_2C_2O_4}{134 \ g \ Na_2C_2O_4} \times \frac{1 \ mol \ C_2O_4^-}{1 \ mol \ Na_2C_2O_4} )

M_1=0.1409 \ M[/tex]

4. oxalic acid as ___ a remover

Answer:

Oxalic Acid Is A Rust Remover

Explanation:

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Answer:

Stain and rust

Explanation:

Oxalic acid removes rust and stains caused by iron,water and tannic acid.

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5. A titration of an acid and base to the equivalence point results in a noticeably acidic solution. it is likely this titration involves

a weak acid and a weak base (where Ka equals Kp). a strong acid and a weak base.

6. Is oxalic acid a acid cleaner

Yes because oxalic Acid is a reliable & effective cleaner when used in appropriate applications.

7. Oxalic acid is a diprotic acid. Calculate the percent of oxalic acid (H2C2O4) in a solid, given that a 0.7984 g sample of that solid required 37.98 mL of 0.2283 N Ba(OH)2 for neutralization.

Answer:

This method of quantitative determination of percent purity is titrimetric reactions. These reactions most commonly involve neutralization reactions between an acid and a base. Then, we look at the neutralization reaction: H₂C₂O₄ + 2 NaOH ⇒ Na₂C₂O₄ + 2 H₂O So, we do the stoichiometric calculations. The important data we should know is the molar mass of oxalic acid which is equal to 90 g/mol. (0.2283 mol/L NaOH * 0.3798 L * 1 mol H₂C₂O₄/ 2mol NaOH * 90 g/mol H₂C₂O₄) ÷ 0.7984 g *100% = 488% This is impossible. The purity can't be more than 100%. Looking at our calculations and the balance reaction, all steps were done correctly. So, I think there is some typographical error in the given. The mass of the sample should be 7.984 g. Then, the answer would be 48.87% purity

Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/826491-oxalic-acid-is-a-diprotic-acid-calculate-the-percent-of-oxalic.html#answer1113505

8. 5. The following are the types of abrasive cleaners except one.A. Muriatic acidC.Phosphoric acidB. Oxalic acid D.Sulfamic acid

Answer:

A. lods tama yan tama yan

Answer:

a. muriatic acid

Explanation:

delikado yun kapag naamoy kapag naglilinis ng bahay Kaya bawal yun

9. 1. What is the importance of acid-base titrations?

Acid-base titration is important which aims to determine the concentration of an acidic solution by titrating it with a known concentration of a base solution, or vice versa, until neutralization. Therefore, air and salt are produced when a strong acid and a strong base react.

What is Acid-Base Titration?

An acid-base titration is the concentration of an acid solution with a known base solution, indicating that this is also included in the titration and must be based on a neutralization reaction. The equivalence point is indicated by a color change in the indicator. On the other hand, the titration status also shows a color change, which is called the end point of the titration. For correct titration results, a method can be used to see the points of difference between the end point of the titration and the equivalence.

Types of acid-base titration

There are two types of acid-base titrations:

Acidimetry is used to determine the value of the concentration of a base solution using a standard acid solution.

Alkalimetric test is used to determine the value of the concentration of a base solution using a standard acid solution.

Application of acid-base titration in daily life

- The food industry

Examples are foods like vinegar, which contain a weak acid called acetic acid. This product is the result of certain manufacturers' using different levels of acetic acid. because the product has a fundamental difference from factory to factory.

- Cosmetics manufacturing

Apart from the food industry, the cosmetic industry is another field where acid-base titration products are often used. Titration determines the exact concentration and amount of ingredients used in the manufacture of cosmetics. From hair dyes, shampoos, conditioners, and detergents to acid and alkaline night creams,etc.

- Wine industrial.

Titration plays an important role in the development of the wine industry and the processes that affect its quality. It is necessary to measure the concentration of some acids, such as tartaric acid, malic acid, and citric acid. They have different effects on the taste, color, and microbes of wine.

Learn more about related information at https://brainly.ph/question/28239536

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10. What is the pH of a 2.15 x 10^-3 M oxalic acid (H2C2O4)? The Ka of oxalic acid is 6.4 x 10^-5.

Answer:

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11. Which of the following is NOT an acid cleanera. oxalic acida. formic acidb. muriatic acidc. sulfamic acid

Answer:

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Answer:

C. Sulfamic acid

Explanation:

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12. A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to Fe2+ in acid and then titrating the Fe²+ with MnO4. A sample was dissolved in acid and then titrated with 39.32 mL of 0.03190 M KMnO4 (in the form of MnO4). What is the mass of Iron, Fe (in the form of Fe2+)? The balanced equation is 8H+ (aq) +5Fe²+ (aq) + MnO (aq)

Answer:

69.9% to three significant figures.

13. Chemistry libretexts acid-base titration

✏️Answer

Acid-Base titrations are usually used to find the amount of a known acidic or basic substance through acid base reactions. The analyte (titrand) is the solution with an unknown molarity. The reagent (titrant) is the solution with a known molarity that will react with the analyte.

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14. Based on the titration results, what is the concentration of the sulfuric acid?

Answer:

b. 0.24 M

Explanation:

eq acid = eq base

(f acid)(M acid)(V acid) = (f base)(M base)(V base)

M acid = (f base)(M base)(V base) / (f acid)(V acid)

M acid = (1)(0.16 M)(36 m L) / (2)(12 m L)

M acid = 0.24 M

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15. 15. Below are the types of abrasive cleaners except one.A. oxalic acidB. formic acidC. muriatic acidD. sulfamic acid

Answer:

B formic acid

Explanation:

Formic acid is the simplest carboxylic acid, containing a single carbon. Occurs naturally in various sources including the venom of bee and ant stings, and is a useful organic synthetic reagent. Principally used as a preservative and antibacterial agent in livestock feed.

16. How many molecules of oxalic acid are in 16.5g

SOLUTION:

Step 1: Calculate the molar mass of oxalic acid (H₂C₂O₄).

The molar masses of H, C, and O are 1.008 g, 12.011 g, and 15.999 g, respectively.

[tex]\begin{aligned} \text{molar mass} & = \text{2(1.008 g) + 2(12.011 g) + 4(15.999 g)} \\ & = \text{90.034 g} \end{aligned}[/tex]

Step 2: Calculate the number of molecules of oxalic acid by using dimensional analysis.

There are 6.022 × 10²³ particles in 1 mole of any substance.

[tex]\begin{aligned} \text{number of} \: \text{H}_2\text{C}_2\text{O}_4 \: \text{molecules} & = \text{16.5 g} \: \text{H}_2\text{C}_2\text{O}_4 \times \frac{\text{1 mol} \: \text{H}_2\text{C}_2\text{O}_4}{\text{90.034 g} \: \text{H}_2\text{C}_2\text{O}_4} \times \frac{6.022 \times 10^{23} \: \text{H}_2\text{C}_2\text{O}_4 \: \text{molecules}}{\text{1 mol} \: \text{H}_2\text{C}_2\text{O}_4} \\ & = \boxed{1.10 \times 10^{23} \: \text{molecules}} \end{aligned}[/tex]

Hence, there are 1.10 × 10²³ molecules present in 16.5 g of oxalic acid.

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17. A 0.200-g sample of pyrolusite is analyzed for manganese content as follows. Add 50.00 mL of a 0.100 M solution of ferrous ammonium sulfate to reduce the MnO2 to Mn2+. After reduction is complete, the excess ferrous ion is titrated in acid solution with 0.0200 M KMnO4.

Answer:

The reaction bet. Fe^2+ and MnO4^- is:

5Fe^2+ + MnO4^- + 8H^+ -> 5Fe^3+ + Mn^2+ + 4H2O

Answer:

639-g kilo gram lets go

Explanation:

for points only

18. is oxalic acid an acid or base?

It is a white crystalline solid that forms a colorless solution in water. Its condensed formula is HOOCCOOH, reflecting its classification as the simplest dicarboxylic acid. ), is a chelating agent for metal cations.

19. benefits to humans of oxalic acid

Answer:

Oxalic acid is toxic because of its acidic and chelating properties. It may cause burns, nausea, severe gastroenteritis and vomiting, shock and convulsions. It is especially toxic when ingested. As little as 5 to 15 grams (71 mg/kg) may be fatal to humans.

20. true or false In lakes,the acid-balance is provided by the oxalates in rocks.

Answer:

maybe true

Explanation:

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