4 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Checking Acid Capacity After a Gas Leaves 4 questions
Checking Acid Capacity After a Gas Leaves
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A rinse simulation contains a nonvolatile acid and a dissolved acid gas. A complete base test counts the moles of OH- used by both. In the model each mole of dissolved gas accounts for two moles of OH-. A second test removes only the dissolved gas before measuring base use.
| Equal starting portions | OH- used in complete base test (mol) |
|---|---|
| P, gas retained | 0.010 |
| Q, gas removed | 0.004 |
Question 1
Which reading gives the base used by the nonvolatile acid alone?
- 0.004 mol from Q
- 0.006 mol from the difference
- 0.010 mol from P
- 0.014 mol from the sum
Question 2
Calculate the dissolved gas amount that was present in P.
Write your answer and work on the printable worksheet, or answer online.
Question 3
A student says the base-use difference equals the number of moles of gas. Explain how the model ratio changes the interpretation.
Write your answer and work on the printable worksheet, or answer online.
A new portion from the same rinse loses only half its original gas. The nonvolatile acid amount stays unchanged.
Question 4
Find the moles of OH⁻ expected in the complete base test for the new portion.
Write your answer and work on the printable worksheet, or answer online.
2025 Chemistry Reference Tables · Browse Chemistry worksheets