Answer:
The Ka is 3.74 *10^-4
Explanation:
Step 1: Data given
Mass of aspirin = 2.00 grams
Volume of water = 0.600 L
pH of solution = 2.61
Molar mass of acetylsalicylic acid = 180 g/mol
Step 2: The balanced equation
C9H8O4 + H2O ⇆ H3O+ + C9H7O4-
Step 3: Calculate moles acetylsalicylic acid
Moles acetylsalicylic acid = mass / molar mass
Moles acetylsalicylic acid = 2.00 grams / 180 g/mol
Moles acetylsalicylic acid = 0.0111 moles
Step 4: The initial concentration
[C9H8O4] = 0.0111 moles / 0.600 L = 0.0185 M
[H3O+] = 0M
[C9H8O4-] = 0M
Step 5: The concentration at the equilibrium
[C9H8O4] =0.0185 - X M
[H3O+] = XM
[C9H8O4-] = XM
Step 6: Calculate Ka
Ka = [H3O+][C9H7O4-] / [C9H8O4]
Ka = x² / (0.0185 - x)
pH = 2.61; [H3O+] = 10^-pH = 10^-2.61 = 0.00245 = x
Ka = (0.00245)² / (0.0185 - 0.00245) = 3.74 * 10^-4
The Ka is 3.74 *10^-4
The answer is D, wavelength
Hope I helped!
One molecule of sucrose is burned with oxygen to make carbon dioxide and water.
Disaccharide sugar sucrose is composed of glucose and fructose. It is produced naturally by plants and is the main component of white sugar. C₁₂H₂₂O₁₁ is the chemical formula for it.
Extraction and refining sucrose for human use can be done from either sugarcane or sugar beet. Raw sugar is created from crushing the cane, which is consistently delivered to other sectors to be refined into pure sucrose. Sugar mills generally are located in the tropical regions near the sugarcane plantations.
<em> C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O</em>
When one molecule of sucrose is burnt, we get 12 carbon dioxide molecules.
To learn more about sucrose,
brainly.com/question/978083
#SPJ1
