Question

1. Calculate the concentration of oxalic acid in the 25 mL aliquot.

A) 0.240 M
B) 0.216 M
C) 0.225 M
D) 0.210 M

2. Calculate the concentration of oxalic acid in the 250 mL volumetric flask.
A) 0.024 M
B) 0.0216 M
C) 0.0225 M
D) 0.0210 M

3. What is Lily's height 3 seconds after jumping?
A) 464 feet
B) 484 feet
C) 472 feet
D) 452 feet

4. How long will it take Lily to hit the water?
A) 6 seconds
B) 8 seconds
C) 4 seconds
D) 10 seconds

5. 5/6 x (-8/15)
A) -4/5
B) -2/5
C) 4/5
D) 2/5

Answer 1

The concentration of oxalic acid in the 25 mL aliquot is 0.056 M.

Step-by-step explanation:

The concentration of oxalic acid can be calculated using the formula:

Concentration of H3O+ = [H3O+] = 10(-pKa) * Molarity of oxalic acid

For oxalic acid with pKa1 = 1.25:

[H3O+] = 10(-1.25) * 0.3 M = 0.056 M

Therefore, the concentration of oxalic acid in the 25 mL aliquot is 0.056 M.