Silver has to give up one electron in order to achieve a pseudo-noble gas electronic configuration.<span />
Answer:
You basically want to balance these equations.
(6)CH4 → (1)C6H6 + (9)H2
(2)C2H6 + (7)O2 → (4)CO2 + (6)H2O
NOTE: DO NOT PUT BRACKETS IN YOUR ANSWER, I HAVE PUT HERE FOR THE ANSWERS INSTEAD OF QUESTION MARKS.
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
