Table 3. Appearance of the solid samplesBenzoic acid(X1)Benzoic acid-Salt mixture(X)Appearance
1. Table 3. Appearance of the solid samplesBenzoic acid(X1)Benzoic acid-Salt mixture(X)Appearance
Answer:
x
Explanation:
benzoic acid-salt solid examples
2. A sample of benzoic acid solution in soda is 0.50 % by mass. What mass of benzoic acid is present in 150g solution?
Answer:
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3. Benzoic acid characteristics?
Benzoic acid, C6H5COOH, is a colourless crystalline solid and the simplest aromatic carboxylic acid. Benzoic acid occurs naturally free and bound as benzoic acid esters in many plant and animal species. Appreciable amounts have been found in most berries (around 0. 05%). Cranberries contain as much as 300-1300 mg free benzoic acid per kg fruit. Benzoic acid is a fungistatic compound that is widely used as a food preservative. It often is conjugated to glycine in the liver and excreted as hippuric acid. Benzoic acid is a byproduct of phenylalanine metabolism in bacteria. It is also produced when gut bacteria process polyphenols (from ingested fruits or beverages).
4. Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 X 10-5 for benzoic acid]
Answer:
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5. A sample of benzoic acid
Answer:
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6. A sample of benzoic acid solution in soda is 0.50 % by mass. What mass of benzoic acid is present in 150g solution?paki sagot po please
Answer:
75g
Explanation:
0.50 percent = 1/2
150/2=75
pls correct me if im wrong
7. what did you observe while benzoic acid is melting
I observed it bubbling.
8. Why benzoic acid is used as the calorimeter standard?
Answer:
Benzoic acid (C6H5CO2H) is often used for this purpose because it is a crystalline solid that can be obtained in high purity. ...
9. 4. Which of the following additives prevent rancidity in smoked and dried fish?a. Acetic Citric acidC. Benzoic acidb. Ascorbic acidd. Citric acid
Answer:
D. Citric acid
Explanation:
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10. Why is the 1 g benzoic acid in 5 ml in h2o produces dim light?
Answer:
The primary reason benzoic acid dissolves only slightly or poorly in cold water is that, because of a polar carboxylic group, the bulk amount of the benzoic acid molecule is non-polar. It is only the carboxylic group that is polar.
11. Questions: 1. Explain why stearic acid has higher melting point than decanoic acid. 2. Explain why salicylic acid has higher melting point than benzoic acid. 3. Explain why benzoic acid has higher melting point than stearic acid.
Answer:
1.Molecular weightStearic acid is a C18 fatty acid and palmitic acid is C16 fatty acid. Both are saturated fatty acids but stearic acid (C18) has more molecular weight than palmitic acid (C16) hence more melting point. Molecular weight increases with number of carbons and hence chain length of the fatty acid.2.Benzoic acid helps prevent infection caused by bacteria. Salicylic acid helps the body shed rough or dead skin cells.3.I do understand that organic acids can bond with both London dispersion forces (van der Waals) and hydrogen bonds (due to the -COOH group). ... I have also learned that the longer carbon chains, the higher melting point due to the increase of the London dispersion forces.Explanation:
yan lang po alam kohope it helpAnswer:
1. Molecular weight
Molecular weightStearic acid is a C18 fatty acid and palmitic acid is C16 fatty acid. Both are saturated fatty acids but stearic acid (C18) has more molecular weight than palmitic acid (C16) hence more melting point. Molecular weight increases with number of carbons and hence chain length of the fatty acid
3. I have also learned that the longer carbon chains, the higher melting point due to the increase of the London dispersion forces
12. What is the condensed formula of Benzoic Acid
Answer:
CONDENSED MILK
Explanation:
Answer:
Benzoic acid | C7H6O2 |
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13. B. Identify which of the following is a substance or a mixture, Write M for mixture and S for substance. ____1. distilled water ____2. benzoic acid ____3. vinegar ____4. benzoic acid-salt" ____5. mineral water ____6. benzoic acid-monosodium glutamate" ____7. seawater
Answer:
1. M
2.S
3.M
4.M
5.M
6.M
7.S
Explanation:
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14. Benzoic AcidIt melts completely.meltingBenzoic Acid-salt mixtureGuide Questions:1. Which among the two samples is a substance? Mixture?
Answer:
Benzoic Acid-salt mixture
15. Which of the following solvent will differentiate benzoic acid from phenol?
Answer:
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16. Which is more polar benzoic acid or sodium benzoate?
Answer:
sodium benzoate will be MORE soluble in water because sodium benzoate is more polar Sodium Benzoate than benzoic acid. ... No, sodium benzoate will be LESS soluble in water because sodium benzoate is more polar than benzoic acid.
Answer:
Yes, sodium benzoate will be MORE soluble in water because sodium benzoate is more polar Sodium Benzoate than benzoic acid. No, sodium benzoate will be LESS soluble in water because sodium benzoate is more polar than benzoic acid.17. Why does adding naoh increase the solubility of benzoic acid in water?
Answer:
Adding NaOH will neutralize the benzoic acid producing the benzoate ion, which now goes into the aqueous layer, leaving other two organic compounds in the ether.
Answer:
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18. Recrystallization of benzoic acid lab report discussion
Answer:
Using a Simulated Industrial Setting for the Development of an Improved Solvent System for the Recrystallization of Benzoic Acid: A Student-Centered Project
Answer:
in this experiment a technique was used that will be used frequently throughout the semester: purification by recrystallization. this technique allows for the purification of a crude material. the small loss is yelled is made up by the high again in purity
19. a solution of 5.0 g benzoic acid
The molar mass of benzoic acid is 251.3 g/mol
Explanation:
∆T = m × Kb
m (molality) = ∆T/Kb = (77.5 - 76.5)/5.03 = 1/5.03 = 0.199 mol/kg
Molar mass of benzoic acid = mass of benzoic acid ÷ (molality × mass of CCl4 in kilograms) = 5 ÷ (0.199 × 100/1000) = 5 ÷ 0.0199 = 251.3 g/mol
20. it is necessary to cover the beaker containing the benzoic acid solution while cooling down?why?
it is necessary to cover the beaker because our skin may cracking with redness and itching. Benzoic acid in high concentrations, particularly in susceptible individuals, may cause a skin allergy. If allergy develops, very low future exposure can cause itching and skin rash.
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21. Self Test: Solve the following problems below 1. Calculate the pH of a buffer composed of 0.12M benzoic acid and 0.20M sodium benzoate? Ka benzoic acid = 6.3 x 10-5
A buffer solution is composed of weak acid and its conjugate base.
[tex]HA\leftrightharpoons A^- + H^+ \\K_a=\frac{[A^-][H^+]}{[HA]} \\\begin{matrix}\\&HA&\leftrightharpoons&A^-&+&H^+\\initial&0.12&&0.2&&0\\change&-x&&x&&x\\equilibrium&0.12-x&&0.2+x&&x\end{matrix}\\\\6.3\times 10^{-5}=\frac{(0.2+x)(x)}{(0.12-x)}\\x=[H^+]=3.7781\times 10^{-5} \ M\\pH=-log[H^+]=4.42[/tex]
22. Why is benzoic acid used in bomb calorimetry?
Benzoic acid (C6H5CO2H) is often used for this purpose because it is a crystalline solid that can be obtained in high purity. The combustion of benzoic acid in a bomb calorimeter releases 26.38 kJ of heat per gram (i.e., its ΔHcomb = −26.38 kJ/g).
#CARRYONLEARNING#BRAINLIEST Please :')23. The amide formed in the reaction of benzoic acid and ethylamine is
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24. which of the following additives prevent rancidity in smoked and dried fish?A. Acetic Citric Acid B. Ascorbic AcidC. Benzoic AcidD. Citric Acid
Answer:
D. Citric Acid
Explanation:
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25. How does the structure of benzoic acid affect solubility in 5% nacho3?
•answer•
For example, benzoic acid is not soulable in water, yet it is soluble in sodium hydroxide solution and in sodium hydrogen carbonate solution because these bases react with benzoic acid to form the water-soluble benzoate ion.
•direct answer•{not soulable in water}
Answer:
For example, benzoic acid is not soluble in water, yet it is soluble in sodium hydroxide solution and in sodium hydrogen carbonate solution because these bases react with benzoic acid to form the water-soluble benzoate ion.
26. Why is sodium benzoate more soluble in water than benzoic acid?
Sodium benzoate is soluble in water because it dissolves in water very well, to the extent of 60 or so g per 100 g of water depending on the temperature
27. Benzoic acid + sodium sulfate sublimation
Benzoic acid is a common preservative, while sodium chloride is one of humankind's most ancient and popular seasonings. You can separate a mixture of these two compounds by exploiting the difference in solubility. Benzoic acid is poorly soluble in cold water, while sodium chloride dissolves well in water even at cold temperatures. Many high school or college intro labs involve an experiment of this kind to teach students how to separate components of a mixture.
Transfer the sample of benzoic acid and sodium chloride to one of the 250 ml beakers.
Add 75 ml of water.
Stir the mixture to dissolve the salt.
Prepare an ice water bath in the 1-liter beaker. Place the 250 ml beaker in the ice water bath, but without allowing it to tip over or take in water from the ice bath. Continue to stir the mixture.
Place a piece of filter paper in the funnel, and dampen it slightly so it adheres to the funnel. Place the empty 250 ml beaker beneath it, and pour the mixture through the filter paper in the funnel. The benzoic acid, which did not dissolve, will remain in the filter paper, while the sodium chloride solution will pass through.
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28. Is benzoic acid dependent or independent variable??
Answer:
Independent Variable
29. Why are there differences in the solubility of the benzoic and acetic acid?
Answer:
Benzoic acid is less soluble in water than acetic acid because benzoic acid has a benzene moiety attached to it which is purely organic and non-polar in nature this decreases its solubility in water while ethanoic acid is more soluble because the organic part is smaller in size so it is can easily form Hydrogen bonds.
30. 8. It is the acid that is found inside our stomach. a. Muriatic Acid b. Sulfuric Acid c. Hydrochloric Acid d. Benzoic acid
Answer:
8. It is the acid that is found inside our stomach. a. Muriatic Acid b. Sulfuric Acid c. Hydrochloric Acid d. Benzoic acid
